A general term for the complete or partial loss of the ability to hear from one or both ears.
Hearing loss resulting from damage to the COCHLEA and the sensorineural elements which lie internally beyond the oval and round windows. These elements include the AUDITORY NERVE and its connections in the BRAINSTEM.
Hearing loss due to exposure to explosive loud noise or chronic exposure to sound level greater than 85 dB. The hearing loss is often in the frequency range 4000-6000 hertz.
Part of an ear examination that measures the ability of sound to reach the brain.
Wearable sound-amplifying devices that are intended to compensate for impaired hearing. These generic devices include air-conduction hearing aids and bone-conduction hearing aids. (UMDNS, 1999)
The ability or act of sensing and transducing ACOUSTIC STIMULATION to the CENTRAL NERVOUS SYSTEM. It is also called audition.
Partial hearing loss in both ears.
Hearing loss due to interference with the mechanical reception or amplification of sound to the COCHLEA. The interference is in the outer or middle ear involving the EAR CANAL; TYMPANIC MEMBRANE; or EAR OSSICLES.
Conditions that impair the transmission of auditory impulses and information from the level of the ear to the temporal cortices, including the sensorineural pathways.
Hearing loss in frequencies above 1000 hertz.
The testing of the acuity of the sense of hearing to determine the thresholds of the lowest intensity levels at which an individual can hear a set of tones. The frequencies between 125 and 8000 Hz are used to test air conduction thresholds and the frequencies between 250 and 4000 Hz are used to test bone conduction thresholds.
Sensorineural hearing loss which develops suddenly over a period of hours or a few days. It varies in severity from mild to total deafness. Sudden deafness can be due to head trauma, vascular diseases, infections, or can appear without obvious cause or warning.
Measurement of hearing based on the use of pure tones of various frequencies and intensities as auditory stimuli.
Partial or complete hearing loss in one ear.
Noise present in occupational, industrial, and factory situations.
Gradual bilateral hearing loss associated with aging that is due to progressive degeneration of cochlear structures and central auditory pathways. Hearing loss usually begins with the high frequencies then progresses to sounds of middle and low frequencies.
Electrical waves in the CEREBRAL CORTEX generated by BRAIN STEM structures in response to auditory click stimuli. These are found to be abnormal in many patients with CEREBELLOPONTINE ANGLE lesions, MULTIPLE SCLEROSIS, or other DEMYELINATING DISEASES.
A general term for the complete loss of the ability to hear from both ears.
The part of the inner ear (LABYRINTH) that is concerned with hearing. It forms the anterior part of the labyrinth, as a snail-like structure that is situated almost horizontally anterior to the VESTIBULAR LABYRINTH.
Persons with any degree of loss of hearing that has an impact on their activities of daily living or that requires special assistance or intervention.
Personal devices for protection of the ears from loud or high intensity noise, water, or cold. These include earmuffs and earplugs.
Procedures for correcting HEARING DISORDERS.
Any sound which is unwanted or interferes with HEARING other sounds.
Hearing loss without a physical basis. Often observed in patients with psychological or behavioral disorders.
Self-generated faint acoustic signals from the inner ear (COCHLEA) without external stimulation. These faint signals can be recorded in the EAR CANAL and are indications of active OUTER AUDITORY HAIR CELLS. Spontaneous otoacoustic emissions are found in all classes of land vertebrates.
The essential part of the hearing organ consists of two labyrinthine compartments: the bony labyrinthine and the membranous labyrinth. The bony labyrinth is a complex of three interconnecting cavities or spaces (COCHLEA; VESTIBULAR LABYRINTH; and SEMICIRCULAR CANALS) in the TEMPORAL BONE. Within the bony labyrinth lies the membranous labyrinth which is a complex of sacs and tubules (COCHLEAR DUCT; SACCULE AND UTRICLE; and SEMICIRCULAR DUCTS) forming a continuous space enclosed by EPITHELIUM and connective tissue. These spaces are filled with LABYRINTHINE FLUIDS of various compositions.
Hearing loss due to disease of the AUDITORY PATHWAYS (in the CENTRAL NERVOUS SYSTEM) which originate in the COCHLEAR NUCLEI of the PONS and then ascend bilaterally to the MIDBRAIN, the THALAMUS, and then the AUDITORY CORTEX in the TEMPORAL LOBE. Bilateral lesions of the auditory pathways are usually required to cause central hearing loss. Cortical deafness refers to loss of hearing due to bilateral auditory cortex lesions. Unilateral BRAIN STEM lesions involving the cochlear nuclei may result in unilateral hearing loss.
A form of electrophysiologic audiometry in which an analog computer is included in the circuit to average out ongoing or spontaneous brain wave activity. A characteristic pattern of response to a sound stimulus may then become evident. Evoked response audiometry is known also as electric response audiometry.
A nonspecific symptom of hearing disorder characterized by the sensation of buzzing, ringing, clicking, pulsations, and other noises in the ear. Objective tinnitus refers to noises generated from within the ear or adjacent structures that can be heard by other individuals. The term subjective tinnitus is used when the sound is audible only to the affected individual. Tinnitus may occur as a manifestation of COCHLEAR DISEASES; VESTIBULOCOCHLEAR NERVE DISEASES; INTRACRANIAL HYPERTENSION; CRANIOCEREBRAL TRAUMA; and other conditions.
Objective tests of middle ear function based on the difficulty (impedance) or ease (admittance) of sound flow through the middle ear. These include static impedance and dynamic impedance (i.e., tympanometry and impedance tests in conjunction with intra-aural muscle reflex elicitation). This term is used also for various components of impedance and admittance (e.g., compliance, conductance, reactance, resistance, susceptance).
Sensory cells in the organ of Corti, characterized by their apical stereocilia (hair-like projections). The inner and outer hair cells, as defined by their proximity to the core of spongy bone (the modiolus), change morphologically along the COCHLEA. Towards the cochlear apex, the length of hair cell bodies and their apical STEREOCILIA increase, allowing differential responses to various frequencies of sound.
The teaching or training of those individuals with hearing disability or impairment.
The audibility limit of discriminating sound intensity and pitch.
The process whereby an utterance is decoded into a representation in terms of linguistic units (sequences of phonetic segments which combine to form lexical and grammatical morphemes).
Transmission of sound waves through vibration of bones in the SKULL to the inner ear (COCHLEA). By using bone conduction stimulation and by bypassing any OUTER EAR or MIDDLE EAR abnormalities, hearing thresholds of the cochlea can be determined. Bone conduction hearing differs from normal hearing which is based on air conduction stimulation via the EAR CANAL and the TYMPANIC MEMBRANE.
The study of hearing and hearing impairment.
Use of sound to elicit a response in the nervous system.
Surgical insertion of an electronic hearing device (COCHLEAR IMPLANTS) with electrodes to the COCHLEAR NERVE in the inner ear to create sound sensation in patients with residual nerve fibers.
The identification of selected parameters in newborn infants by various tests, examinations, or other procedures. Screening may be performed by clinical or laboratory measures. A screening test is designed to sort out healthy neonates (INFANT, NEWBORN) from those not well, but the screening test is not intended as a diagnostic device, rather instead as epidemiologic.
Hearing loss due to damage or impairment of both the conductive elements (HEARING LOSS, CONDUCTIVE) and the sensorineural elements (HEARING LOSS, SENSORINEURAL) of the ear.
Either of a pair of compound bones forming the lateral (left and right) surfaces and base of the skull which contains the organs of hearing. It is a large bone formed by the fusion of parts: the squamous (the flattened anterior-superior part), the tympanic (the curved anterior-inferior part), the mastoid (the irregular posterior portion), and the petrous (the part at the base of the skull).
The space and structures directly internal to the TYMPANIC MEMBRANE and external to the inner ear (LABYRINTH). Its major components include the AUDITORY OSSICLES and the EUSTACHIAN TUBE that connects the cavity of middle ear (tympanic cavity) to the upper part of the throat.
The sensory ganglion of the COCHLEAR NERVE. The cells of the spiral ganglion send fibers peripherally to the cochlear hair cells and centrally to the COCHLEAR NUCLEI of the BRAIN STEM.
A small bony canal linking the vestibule of the inner ear to the posterior part of the internal surface of the petrous TEMPORAL BONE. It transmits the endolymphatic duct and two small blood vessels.
Measurement of the ability to hear speech under various conditions of intensity and noise interference using sound-field as well as earphones and bone oscillators.
The spiral EPITHELIUM containing sensory AUDITORY HAIR CELLS and supporting cells in the cochlea. Organ of Corti, situated on the BASILAR MEMBRANE and overlaid by a gelatinous TECTORIAL MEMBRANE, converts sound-induced mechanical waves to neural impulses to the brain.
Pathological processes of the inner ear (LABYRINTH) which contains the essential apparatus of hearing (COCHLEA) and balance (SEMICIRCULAR CANALS).
An oval semitransparent membrane separating the external EAR CANAL from the tympanic cavity (EAR, MIDDLE). It contains three layers: the skin of the external ear canal; the core of radially and circularly arranged collagen fibers; and the MUCOSA of the middle ear.
Ability to make speech sounds that are recognizable.
Sensory cells of organ of Corti. In mammals, they are usually arranged in three or four rows, and away from the core of spongy bone (the modiolus), lateral to the INNER AUDITORY HAIR CELLS and other supporting structures. Their cell bodies and STEREOCILIA increase in length from the cochlear base toward the apex and laterally across the rows, allowing differential responses to various frequencies of sound.
The cochlear part of the 8th cranial nerve (VESTIBULOCOCHLEAR NERVE). The cochlear nerve fibers originate from neurons of the SPIRAL GANGLION and project peripherally to cochlear hair cells and centrally to the cochlear nuclei (COCHLEAR NUCLEUS) of the BRAIN STEM. They mediate the sense of hearing.
Pathological processes of the snail-like structure (COCHLEA) of the inner ear (LABYRINTH) which can involve its nervous tissue, blood vessels, or fluid (ENDOLYMPH).
The record of descent or ancestry, particularly of a particular condition or trait, indicating individual family members, their relationships, and their status with respect to the trait or condition.
A test to determine the lowest sound intensity level at which fifty percent or more of the spondaic test words (words of two syllables having equal stress) are repeated correctly.
An abnormally disproportionate increase in the sensation of loudness in response to auditory stimuli of normal volume. COCHLEAR DISEASES; VESTIBULOCOCHLEAR NERVE DISEASES; FACIAL NERVE DISEASES; STAPES SURGERY; and other disorders may be associated with this condition.
A group of homologous proteins which form the intermembrane channels of GAP JUNCTIONS. The connexins are the products of an identified gene family which has both highly conserved and highly divergent regions. The variety contributes to the wide range of functional properties of gap junctions.
Auditory sensory cells of organ of Corti, usually placed in one row medially to the core of spongy bone (the modiolus). Inner hair cells are in fewer numbers than the OUTER AUDITORY HAIR CELLS, and their STEREOCILIA are approximately twice as thick as those of the outer hair cells.
Examination of the EAR CANAL and eardrum with an OTOSCOPE.
Sound that expresses emotion through rhythm, melody, and harmony.
Tests of the ability to hear and understand speech as determined by scoring the number of words in a word list repeated correctly.
A disease of the inner ear (LABYRINTH) that is characterized by fluctuating SENSORINEURAL HEARING LOSS; TINNITUS; episodic VERTIGO; and aural fullness. It is the most common form of endolymphatic hydrops.
A layer of stratified EPITHELIUM forming the endolymphatic border of the cochlear duct at the lateral wall of the cochlea. Stria vascularis contains primarily three cell types (marginal, intermediate, and basal), and capillaries. The marginal cells directly facing the ENDOLYMPH are important in producing ion gradients and endochoclear potential.
A benign SCHWANNOMA of the eighth cranial nerve (VESTIBULOCOCHLEAR NERVE), mostly arising from the vestibular branch (VESTIBULAR NERVE) during the fifth or sixth decade of life. Clinical manifestations include HEARING LOSS; HEADACHE; VERTIGO; TINNITUS; and FACIAL PAIN. Bilateral acoustic neuromas are associated with NEUROFIBROMATOSIS 2. (From Adams et al., Principles of Neurology, 6th ed, p673)
The hearing and equilibrium system of the body. It consists of three parts: the EXTERNAL EAR, the MIDDLE EAR, and the INNER EAR. Sound waves are transmitted through this organ where vibration is transduced to nerve signals that pass through the ACOUSTIC NERVE to the CENTRAL NERVOUS SYSTEM. The inner ear also contains the vestibular organ that maintains equilibrium by transducing signals to the VESTIBULAR NERVE.
The electric response evoked in the CEREBRAL CORTEX by ACOUSTIC STIMULATION or stimulation of the AUDITORY PATHWAYS.
The process whereby auditory stimuli are selected, organized, and interpreted by the organism.
Pathological processes of the ear, the hearing, and the equilibrium system of the body.
Fenestra of the cochlea, an opening in the basal wall between the MIDDLE EAR and the INNER EAR, leading to the cochlea. It is closed by a secondary tympanic membrane.
Portable electronics device for storing and playing audio and or media files. MP3 for MPEG-1 audio layer 3, is a digital coding format.
The interference of one perceptual stimulus with another causing a decrease or lessening in perceptual effectiveness.
NEURAL PATHWAYS and connections within the CENTRAL NERVOUS SYSTEM, beginning at the hair cells of the ORGAN OF CORTI, continuing along the eighth cranial nerve, and terminating at the AUDITORY CORTEX.
The graphic registration of the frequency and intensity of sounds, such as speech, infant crying, and animal vocalizations.
Inflammation of the inner ear (LABYRINTH).
Genes that influence the PHENOTYPE only in the homozygous state.
A system of hand gestures used for communication by the deaf or by people speaking different languages.
Pathological processes of the VESTIBULOCOCHLEAR NERVE, including the branches of COCHLEAR NERVE and VESTIBULAR NERVE. Common examples are VESTIBULAR NEURITIS, cochlear neuritis, and ACOUSTIC NEUROMA. Clinical signs are varying degree of HEARING LOSS; VERTIGO; and TINNITUS.
Formation of spongy bone in the labyrinth capsule which can progress toward the STAPES (stapedial fixation) or anteriorly toward the COCHLEA leading to conductive, sensorineural, or mixed HEARING LOSS. Several genes are associated with familial otosclerosis with varied clinical signs.
A characteristic symptom complex.
Inflammation of the middle ear with a clear pale yellow-colored transudate.
The science or study of speech sounds and their production, transmission, and reception, and their analysis, classification, and transcription. (Random House Unabridged Dictionary, 2d ed)
An illusion of movement, either of the external world revolving around the individual or of the individual revolving in space. Vertigo may be associated with disorders of the inner ear (EAR, INNER); VESTIBULAR NERVE; BRAINSTEM; or CEREBRAL CORTEX. Lesions in the TEMPORAL LOBE and PARIETAL LOBE may be associated with FOCAL SEIZURES that may feature vertigo as an ictal manifestation. (From Adams et al., Principles of Neurology, 6th ed, pp300-1)
Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations.
Pathological processes of the VESTIBULAR LABYRINTH which contains part of the balancing apparatus. Patients with vestibular diseases show instability and are at risk of frequent falls.
The fitting and adjusting of artificial parts of the body. (From Stedman's, 26th ed)
The science pertaining to the interrelationship of psychologic phenomena and the individual's response to the physical properties of sound.
Electronic hearing devices typically used for patients with normal outer and middle ear function, but defective inner ear function. In the COCHLEA, the hair cells (HAIR CELLS, VESTIBULAR) may be absent or damaged but there are residual nerve fibers. The device electrically stimulates the COCHLEAR NERVE to create sound sensation.
The exposure to potentially harmful chemical, physical, or biological agents that occurs as a result of one's occupation.
Surgery performed on the external, middle, or internal ear.
Diseases caused by factors involved in one's employment.
Biochemical identification of mutational changes in a nucleotide sequence.
Ability to determine the specific location of a sound source.
The perceived attribute of a sound which corresponds to the physical attribute of intensity.
Autosomal recessive hereditary disorders characterized by congenital SENSORINEURAL HEARING LOSS and RETINITIS PIGMENTOSA. Genetically and symptomatically heterogeneous, clinical classes include type I, type II, and type III. Their severity, age of onset of retinitis pigmentosa and the degree of vestibular dysfunction are variable.
The magnitude of INBREEDING in humans.
A dimension of auditory sensation varying with cycles per second of the sound stimulus.
The acoustic aspects of speech in terms of frequency, intensity, and time.
A mobile chain of three small bones (INCUS; MALLEUS; STAPES) in the TYMPANIC CAVITY between the TYMPANIC MEMBRANE and the oval window on the wall of INNER EAR. Sound waves are converted to vibration by the tympanic membrane then transmitted via these ear ossicles to the inner ear.
The electric response of the cochlear hair cells to acoustic stimulation.
Genes that influence the PHENOTYPE both in the homozygous and the heterozygous state.
Mechanosensing organelles of hair cells which respond to fluid motion or fluid pressure changes. They have various functions in many different animals, but are primarily used in hearing.
A temporary or persistent opening in the eardrum (TYMPANIC MEMBRANE). Clinical signs depend on the size, location, and associated pathological condition.
One of the three ossicles of the middle ear. It transmits sound vibrations from the INCUS to the internal ear (Ear, Internal see LABYRINTH).
A type of non-ionizing radiation in which energy is transmitted through solid, liquid, or gas as compression waves. Sound (acoustic or sonic) radiation with frequencies above the audible range is classified as ultrasonic. Sound radiation below the audible range is classified as infrasonic.
A genus of the family Chinchillidae which consists of three species: C. brevicaudata, C. lanigera, and C. villidera. They are used extensively in biomedical research.
The region of the cerebral cortex that receives the auditory radiation from the MEDIAL GENICULATE BODY.
An institute of the CENTERS FOR DISEASE CONTROL AND PREVENTION which is responsible for assuring safe and healthful working conditions and for developing standards of safety and health. Research activities are carried out pertinent to these goals.
A number of tests used to determine if the brain or balance portion of the inner ear are causing dizziness.
A spiral tube that is firmly suspended in the bony shell-shaped part of the cochlea. This ENDOLYMPH-filled cochlear duct begins at the vestibule and makes 2.5 turns around a core of spongy bone (the modiolus) thus dividing the PERILYMPH-filled spiral canal into two channels, the SCALA VESTIBULI and the SCALA TYMPANI.
The gradual expansion in complexity and meaning of symbols and sounds as perceived and interpreted by the individual through a maturational and learning process. Stages in development include babbling, cooing, word imitation with cognition, and use of short sentences.
An office in the Department of Labor responsible for developing and establishing occupational safety and health standards.
An oval, bony chamber of the inner ear, part of the bony labyrinth. It is continuous with bony COCHLEA anteriorly, and SEMICIRCULAR CANALS posteriorly. The vestibule contains two communicating sacs (utricle and saccule) of the balancing apparatus. The oval window on its lateral wall is occupied by the base of the STAPES of the MIDDLE EAR.
The gradual irreversible changes in structure and function of an organism that occur as a result of the passage of time.
Surgical reconstruction of the hearing mechanism of the middle ear, with restoration of the drum membrane to protect the round window from sound pressure, and establishment of ossicular continuity between the tympanic membrane and the oval window. (Dorland, 28th ed.)
Inflammation of the MIDDLE EAR including the AUDITORY OSSICLES and the EUSTACHIAN TUBE.
An infant during the first month after birth.
Surgery performed in which part of the STAPES, a bone in the middle ear, is removed and a prosthesis is placed to help transmit sound between the middle ear and inner ear.
Standards for limiting worker exposure to airborne contaminants. They are the maximum concentration in air at which it is believed that a particular substance will not produce adverse health effects with repeated daily exposure. It can be a time-weighted average (TLV-TWA), a short-term value (TLV-STEL), or an instantaneous value (TLV-Ceiling). They are expressed either as parts per million (ppm) or milligram per cubic meter (mg/m3).
Cells forming a framework supporting the sensory AUDITORY HAIR CELLS in the organ of Corti. Lateral to the medial inner hair cells, there are inner pillar cells, outer pillar cells, Deiters cells, Hensens cells, Claudius cells, Boettchers cells, and others.
Tumors or cancer of any part of the hearing and equilibrium system of the body (the EXTERNAL EAR, the MIDDLE EAR, and the INNER EAR).
Glycosylated compounds in which there is an amino substituent on the glycoside. Some of them are clinically important ANTIBIOTICS.
A mutation in which a codon is mutated to one directing the incorporation of a different amino acid. This substitution may result in an inactive or unstable product. (From A Dictionary of Genetics, King & Stansfield, 5th ed)
The lymph fluid found in the membranous labyrinth of the ear. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Two membranous sacs within the vestibular labyrinth of the INNER EAR. The saccule communicates with COCHLEAR DUCT through the ductus reuniens, and communicates with utricle through the utriculosaccular duct from which the ENDOLYMPHATIC DUCT arises. The utricle and saccule have sensory areas (acoustic maculae) which are innervated by the VESTIBULAR NERVE.
The 8th cranial nerve. The vestibulocochlear nerve has a cochlear part (COCHLEAR NERVE) which is concerned with hearing and a vestibular part (VESTIBULAR NERVE) which mediates the sense of balance and head position. The fibers of the cochlear nerve originate from neurons of the SPIRAL GANGLION and project to the cochlear nuclei (COCHLEAR NUCLEUS). The fibers of the vestibular nerve arise from neurons of Scarpa's ganglion and project to the VESTIBULAR NUCLEI.
The brain stem nucleus that receives the central input from the cochlear nerve. The cochlear nucleus is located lateral and dorsolateral to the inferior cerebellar peduncles and is functionally divided into dorsal and ventral parts. It is tonotopically organized, performs the first stage of central auditory processing, and projects (directly or indirectly) to higher auditory areas including the superior olivary nuclei, the medial geniculi, the inferior colliculi, and the auditory cortex.
A surgical specialty concerned with the study and treatment of disorders of the ear, nose, and throat.
Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.
The yellow or brown waxy secretions produced by vestigial apocrine sweat glands in the external ear canal.
The co-inheritance of two or more non-allelic GENES due to their being located more or less closely on the same CHROMOSOME.
A membrane, attached to the bony SPIRAL LAMINA, overlying and coupling with the hair cells of the ORGAN OF CORTI in the inner ear. It is a glycoprotein-rich keratin-like layer containing fibrils embedded in a dense amorphous substance.
A POU domain factor that activates neuronal cell GENETIC TRANSCRIPTION of GENES encoding NEUROFILAMENT PROTEINS, alpha internexin, and SYNAPTOSOMAL-ASSOCIATED PROTEIN 25. Mutations in the Brn-3c gene have been associated with DEAFNESS.
Inflammation of the middle ear with purulent discharge.
Age as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or the effect of a circumstance. It is used with human or animal concepts but should be differentiated from AGING, a physiological process, and TIME FACTORS which refers only to the passage of time.
The total number of cases of a given disease in a specified population at a designated time. It is differentiated from INCIDENCE, which refers to the number of new cases in the population at a given time.
The narrow passage way that conducts the sound collected by the EAR AURICLE to the TYMPANIC MEMBRANE.
The blind pouch at the end of the endolymphatic duct. It is a storage reservoir for excess ENDOLYMPH, formed by the blood vessels in the membranous labyrinth.
The ability to differentiate tones.
A spiral thickening of the fibrous lining of the cochlear wall. Spiral ligament secures the membranous COCHLEAR DUCT to the bony spiral canal of the COCHLEA. Its spiral ligament fibrocytes function in conjunction with the STRIA VASCULARIS to mediate cochlear ion homeostasis.
Communication through a system of conventional vocal symbols.
A family of delayed rectifier voltage-gated potassium channels that share homology with their founding member, KCNQ1 PROTEIN. KCNQ potassium channels have been implicated in a variety of diseases including LONG QT SYNDROME; DEAFNESS; and EPILEPSY.
The part of the membranous labyrinth that traverses the bony vestibular aqueduct and emerges through the bone of posterior cranial fossa (CRANIAL FOSSA, POSTERIOR) where it expands into a blind pouch called the endolymphatic sac.
The process by which an observer comprehends speech by watching the movements of the speaker's lips without hearing the speaker's voice.
A subfamily of the Muridae consisting of several genera including Gerbillus, Rhombomys, Tatera, Meriones, and Psammomys.
Naturally occurring or experimentally induced animal diseases with pathological processes sufficiently similar to those of human diseases. They are used as study models for human diseases.
The outward appearance of the individual. It is the product of interactions between genes, and between the GENOTYPE and the environment.
Bacterial infections of the leptomeninges and subarachnoid space, frequently involving the cerebral cortex, cranial nerves, cerebral blood vessels, spinal cord, and nerve roots.
Any enterprise centered on the processing, assembly, production, or marketing of a line of products, services, commodities, or merchandise, in a particular field often named after its principal product. Examples include the automobile, fishing, music, publishing, insurance, and textile industries.
Measurement of parameters of the speech product such as vocal tone, loudness, pitch, voice quality, articulation, resonance, phonation, phonetic structure and prosody.
Rare autosomal recessive disease characterized by multiple organ dysfunction. The key clinical features include retinal degeneration (NYSTAGMUS, PATHOLOGIC; RETINITIS PIGMENTOSA; and eventual blindness), childhood obesity, sensorineural hearing loss, and normal mental development. Endocrinologic complications include TYPE 2 DIABETES MELLITUS; HYPERINSULINEMIA; ACANTHOSIS NIGRICANS; HYPOTHYROIDISM; and progressive renal and hepatic failures. The disease is caused by mutations in the ALMS1 gene.
Conditions characterized by language abilities (comprehension and expression of speech and writing) that are below the expected level for a given age, generally in the absence of an intellectual impairment. These conditions may be associated with DEAFNESS; BRAIN DISEASES; MENTAL DISORDERS; or environmental factors.
Sensory cells in the acoustic maculae with their apical STEREOCILIA embedded in a gelatinous OTOLITHIC MEMBRANE. These hair cells are stimulated by the movement of otolithic membrane, and impulses are transmitted via the VESTIBULAR NERVE to the BRAIN STEM. Hair cells in the saccule and those in the utricle sense linear acceleration in vertical and horizontal directions, respectively.
An individual in which both alleles at a given locus are identical.
Acquired or developmental cognitive disorders of AUDITORY PERCEPTION characterized by a reduced ability to perceive information contained in auditory stimuli despite intact auditory pathways. Affected individuals have difficulty with speech perception, sound localization, and comprehending the meaning of inflections of speech.
An implant used to replace one or more of the ear ossicles. They are usually made of plastic, Gelfoam, ceramic, or stainless steel.
Double-stranded DNA of MITOCHONDRIA. In eukaryotes, the mitochondrial GENOME is circular and codes for ribosomal RNAs, transfer RNAs, and about 10 proteins.
Predetermined sets of questions used to collect data - clinical data, social status, occupational group, etc. The term is often applied to a self-completed survey instrument.
An autosomal dominant disorder characterized by a high incidence of bilateral acoustic neuromas as well as schwannomas (NEURILEMMOMA) of other cranial and peripheral nerves, and other benign intracranial tumors including meningiomas, ependymomas, spinal neurofibromas, and gliomas. The disease has been linked to mutations of the NF2 gene (GENES, NEUROFIBROMATOSIS 2) on chromosome 22 (22q12) and usually presents clinically in the first or second decade of life.
The sum or the stock of words used by a language, a group, or an individual. (From Webster, 3d ed)
Three long canals (anterior, posterior, and lateral) of the bony labyrinth. They are set at right angles to each other and are situated posterosuperior to the vestibule of the bony labyrinth (VESTIBULAR LABYRINTH). The semicircular canals have five openings into the vestibule with one shared by the anterior and the posterior canals. Within the canals are the SEMICIRCULAR DUCTS.
A rare disorder consisting of microangiopathy of brain, retina, and inner ear ARTERIOLES. It is characterized by the clinical triad of encephalopathy, BRANCH RETINAL ARTERY OCCLUSION and VERTIGO/hearing loss.
Studies in which the presence or absence of disease or other health-related variables are determined in each member of the study population or in a representative sample at one particular time. This contrasts with LONGITUDINAL STUDIES which are followed over a period of time.
Elements of limited time intervals, contributing to particular results or situations.
The dense rock-like part of temporal bone that contains the INNER EAR. Petrous bone is located at the base of the skull. Sometimes it is combined with the MASTOID PROCESS and called petromastoid part of temporal bone.
That part of the genome that corresponds to the complete complement of EXONS of an organism or cell.
An individual having different alleles at one or more loci regarding a specific character.
Inbred CBA mice are a strain of laboratory mice that have been selectively bred to be genetically identical and uniform, which makes them useful for scientific research, particularly in the areas of immunology and cancer.
The posterior part of the temporal bone. It is a projection of the petrous bone.
The language and sounds expressed by a child at a particular maturational stage in development.
Disorders of the quality of speech characterized by the substitution, omission, distortion, and addition of phonemes.
Any method used for determining the location of and relative distances between genes on a chromosome.
Most frequently refers to the integration of a physically or mentally disabled child into the regular class of normal peers and provision of the appropriately determined educational program.
An autosomal dominant disorder manifested by various combinations of preauricular pits, branchial fistulae or cysts, lacrimal duct stenosis, hearing loss, structural defects of the outer, middle, or inner ear, and renal dysplasia. Associated defects include asthenic habitus, long narrow facies, constricted palate, deep overbite, and myopia. Hearing loss may be due to Mondini type cochlear defect and stapes fixation. (Jablonski's Dictionary of Syndromes & Eponymic Diseases, 2d ed)
A group of rare autosomal dominant diseases, commonly characterized by atypical URTICARIA (hives) with systemic symptoms that develop into end-organ damage. The atypical hives do not involve T-cell or autoantibody. Cryopyrin-associated periodic syndrome includes three previously distinct disorders: Familial cold autoinflammatory syndrome; Muckle-Wells Syndrome; and CINCA Syndrome, that are now considered to represent a disease continuum, all caused by NLRP3 protein mutations.
An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which, on the basis of epidemiologic evidence, is known to be associated with a health-related condition considered important to prevent.
Disorders of hearing or auditory perception due to pathological processes of the AUDITORY PATHWAYS in the CENTRAL NERVOUS SYSTEM. These include CENTRAL HEARING LOSS and AUDITORY PERCEPTUAL DISORDERS.
The total relative probability, expressed on a logarithmic scale, that a linkage relationship exists among selected loci. Lod is an acronym for "logarithmic odds."
'Abnormalities, Multiple' is a broad term referring to the presence of two or more structural or functional anomalies in an individual, which may be genetic or environmental in origin, and can affect various systems and organs of the body.
Detection of a MUTATION; GENOTYPE; KARYOTYPE; or specific ALLELES associated with genetic traits, heritable diseases, or predisposition to a disease, or that may lead to the disease in descendants. It includes prenatal genetic testing.
Junction between the cerebellum and the pons.
An acute purulent infection of the meninges and subarachnoid space caused by Streptococcus pneumoniae, most prevalent in children and adults over the age of 60. This illness may be associated with OTITIS MEDIA; MASTOIDITIS; SINUSITIS; RESPIRATORY TRACT INFECTIONS; sickle cell disease (ANEMIA, SICKLE CELL); skull fractures; and other disorders. Clinical manifestations include FEVER; HEADACHE; neck stiffness; and somnolence followed by SEIZURES; focal neurologic deficits (notably DEAFNESS); and COMA. (From Miller et al., Merritt's Textbook of Neurology, 9th ed, p111)
Fenestra or oval opening on the lateral wall of the vestibular labyrinth adjacent to the MIDDLE EAR. It is located above the cochlear round window and normally covered by the base of the STAPES.
A mass of KERATIN-producing squamous EPITHELIUM that resembles an inverted (suck-in) bag of skin in the MIDDLE EAR. It arises from the eardrum (TYMPANIC MEMBRANE) and grows into the MIDDLE EAR causing erosion of EAR OSSICLES and MASTOID that contains the INNER EAR.
Studies which start with the identification of persons with a disease of interest and a control (comparison, referent) group without the disease. The relationship of an attribute to the disease is examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.
Recorded electrical responses from muscles, especially the neck muscles or muscles around the eyes, following stimulation of the EAR VESTIBULE.
Membrane proteins whose primary function is to facilitate the transport of negatively charged molecules (anions) across a biological membrane.
The posterior pair of the quadrigeminal bodies which contain centers for auditory function.
Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.
Persons including soldiers involved with the armed forces.
A basement membrane in the cochlea that supports the hair cells of the ORGAN OF CORTI, consisting keratin-like fibrils. It stretches from the SPIRAL LAMINA to the basilar crest. The movement of fluid in the cochlea, induced by sound, causes displacement of the basilar membrane and subsequent stimulation of the attached hair cells which transform the mechanical signal into neural activity.
A group of inherited conditions characterized initially by HEMATURIA and slowly progressing to RENAL INSUFFICIENCY. The most common form is the Alport syndrome (hereditary nephritis with HEARING LOSS) which is caused by mutations in genes for TYPE IV COLLAGEN and defective GLOMERULAR BASEMENT MEMBRANE.
A group of inherited disorders characterized by degeneration of dorsal root and autonomic ganglion cells, and clinically by loss of sensation and autonomic dysfunction. There are five subtypes. Type I features autosomal dominant inheritance and distal sensory involvement. Type II is characterized by autosomal inheritance and distal and proximal sensory loss. Type III is DYSAUTONOMIA, FAMILIAL. Type IV features insensitivity to pain, heat intolerance, and mental deficiency. Type V is characterized by a selective loss of pain with intact light touch and vibratory sensation. (From Joynt, Clinical Neurology, 1995, Ch51, pp142-4)
A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.

Conductive hearing loss produces a reversible binaural hearing impairment. (1/130)

Conductive hearing loss, produced by otitis media with effusion, is widespread in young children. However, little is known about its short- or long-term effects on hearing or the brain. To study the consequences of a conductive loss for the perception and processing of sounds, we plugged the left ear canal of ferrets for 7-15 months during either infancy or adulthood. Before or during plugging, the ferrets were trained to perform a binaural task requiring the detection of a 500 Hz tone, positioned 90 degrees to the right, that was masked by two sources of broad-band noise. In one condition ("control"), both noise sources were 90 degrees right and, in the second condition ("bilateral"), one noise source was moved to 90 degrees left. Normal ferrets showed binaural unmasking: tone detection thresholds were lower (mean 10.1 dB) for the bilateral condition than for the control condition. Both groups of ear-plugged ferrets had reduced unmasking; the mean residual unmasking was 2.3 dB for the infant and 0.7 dB for the adult ear-plugged animals. After unplugging, unmasking increased in both groups (infant, 7.1 dB; adult, 6.9 dB) but not to normal levels. Repeated testing during the 22 months after unplugging revealed a gradual return to normal levels of unmasking. These results show that a unilateral conductive hearing loss, in either infancy or adulthood, impairs binaural hearing both during and after the hearing loss. They show scant evidence for adaptation to the plug and demonstrate a recovery from the impairment that occurs over a period of several months after restoration of normal peripheral function.  (+info)

Congenital absence of the oval window: radiologic diagnosis and associated anomalies. (2/130)

BACKGROUND AND PURPOSE: In most children with conductive hearing loss, acquired otitis media and/or middle ear effusion are ultimately diagnosed. Congenital conductive hearing loss is a rare condition; absence of the oval window is an unusual pathogenesis for this type of hearing impairment and can be associated with an anomalous horizontal facial nerve canal. Our goal was to describe the imaging features of congenital absence of the oval window, to determine the frequency with which anomalous development of the horizontal facial nerve canal occurs, and to review the developmental error responsible for this malformation. METHODS: Nine temporal bones in seven patients (5 to 36 years old) were found to have an inadequately formed oval window on high-resolution CT scans; seven ears showed complete lack of oval window formation, and two showed partial absence of the oval window. Records were reviewed for clinical information, and images were examined for associated anomalies. RESULTS: Six of nine ears with abnormal oval window formation showed malposition of the horizontal facial nerve canal. In each of these, the canal was abnormally low, overlying the expected location of the oval window; three of the canals lacked a visible bony covering. Seven of the nine ears were found to have a dysplastic or absent stapes. CONCLUSION: Congenital absence of the oval window can be diagnosed on CT studies. In the present series, this anomaly was associated with a grossly aberrant horizontal facial nerve canal in six of nine involved ears. Familiarity with the developmental sequence of oval window formation fosters an understanding of these anomalies. Preoperative recognition is important clinically, as a low facial nerve will block surgical access to the oval window and its presence will alter patient management.  (+info)

Otolaryngologists' perceptions of the indications for tympanostomy tube insertion in children. (3/130)

BACKGROUND: Bilateral myringotomy with insertion of tympanostomy tubes is the most common operation that children in Canada undergo. Area variations in surgical rates for this procedure have raised questions about indications used to decide about surgery. The objective of this study was to describe the factors that influence otolaryngologists to recommend tympanostomy tube insertion in children with otitis media and their level of agreement about indications for surgery. METHODS: A survey was sent to all 227 otolaryngologists in Ontario in the fall of 1996. The influence of 17 clinical and social factors on recommendations to insert tympanostomy tubes were assessed. Case vignettes were used to determine the effect of multiple factors in decisions about the need for surgical management. RESULTS: Surveys were returned by 138 (68.3%) of the 202 eligible otolaryngologists. There was agreement (more than 90% of respondents) about 6 indications for surgery: persistent effusion, a lack of improvement after 3 months of antibiotic therapy, a history of persistent effusion for 3 or more months per episode of otitis media, more than 7 episodes of otitis media in 6 months, a bilateral conductive hearing loss of 20 dB or more and a persistently abnormal tympanic membrane. Some respondents were more likely to recommend tube insertion if there were parental concerns about hearing problems or the frequency or severity of episodes of otitis media. Otolaryngologists agreed about the role of tympanostomy tubes in 1 of 4 case vignettes but disagreed about whether adenoidectomy should also be performed in that instance. Most viewed tympanostomy tube insertion as beneficial, with few adverse effects. INTERPRETATION: There is a lack of consensus among practising otolaryngologists in Ontario as to which children with recurrent otitis media or persistent effusion should undergo bilateral myringotomy with tympanostomy tube insertion. These findings suggest the need to revisit clinical guidelines for this procedure.  (+info)

The cerebro-costo-mandibular syndrome: 9-year follow-up of a case. (4/130)

Cerebro-costo-mandibular syndrome (CCMS) is a rare multiple congenital anomaly with a low survival rate. There are few reports of long-term survival in this condition. We describe the findings and management of a 9-year-old survivor of CCMS, outline the importance of early intervention and multidisciplinary team approach. The child presented in the neonatal period in respiratory distress with classical features of the syndrome. Aggressive initial respiratory management was later followed up with an integrated multidisciplinary team approach. He has been carefully followed up for nine years now, illustrating well, the course of the syndrome.  (+info)

Improving the classroom listening skills of children with Down syndrome by using sound-field amplification. (5/130)

Many children with Down syndrome have fluctuating conductive hearing losses further reducing their speech, language and academic development. It is within the school environment where access to auditory information is crucial that many children with Down syndrome are especially disadvantaged. Conductive hearing impairment which is often fluctuating and undetected reduces the child's ability to extract the important information from the auditory signal. Unfortunately, the design and acoustics of the classroom leads to problems in extracting the speech signal through reduced speech intensity due to the increased distance of the student from the teacher in addition to masking from excessive background noise. One potential solution is the use of sound-field amplification which provides a uniform amplification to the teacher's voice through the use of a microphone and loudspeakers. This investigation examined the efficacy of sound-field amplification for 4 children with Down syndrome. Measures of speech perception were taken with and without the sound-field system and found that the children perceived significantly more speech in all conditions where the sound-field system was used (p < .0001). Importantly, listening performance with the sound-field system was not affected by reducing the signal-to-noise ratio through increasing the level of background noise. In summary, sound-field amplification provides improved access to the speech signal for children with Down syndrome and as a consequence leads to improved classroom success.  (+info)

Conductive hearing loss results in changes in cytochrome oxidase activity in gerbil central auditory system. (6/130)

Conductive hearing loss (CHL) restricts auditory input to an intact peripheral auditory system. Effects of deprivation on the central auditory system (CAS) have been debated, although a number of studies support the hypothesis that CHL can cause modification of CAS structure and function. The present study was designed to test the hypothesis that unilateral CHL results in a decrease in cytochrome oxidase (CO) activity in CAS nuclei that receive major afferent input from the affected ear. Gerbils at postnatal day 12 (P21) or 6-8 weeks underwent left unilateral CHL (malleus removal), cochlear ablation, or a sham surgical procedure. After a survival time of 48 hours or 3 weeks, animals were sacrificed and tissue was processed for cytochrome oxidase histochemistry. Optical density (OD) measurements were made from individual neurons in the anteroventral cochlear nucleus (AVCN) and from medial and lateral dendritic fields in the medial superior olivary nucleus (MSO), the lateral superior olivary nucleus, and the inferior colliculus. The width of the CO-stained neuropil in MSO was also measured as an estimate of dendritic length. OD measures were corrected to neutral areas of the brain. Cochlear ablation caused significant decreases in CO activity in left lower brainstem nuclei, particularly in adult animals. Following CHL, a significant decrease in CO activity was observed in the ipsilateral AVCN and a significant increase was observed in the contralateral AVCN. Cochlear ablation resulted in decreased width of MSO neuropil containing dendrites that receive primary input from the ablated ear. CHL resulted in a significant increase in the width of MSO neuropil on both sides of the brain in the P21 animals that survived 3 weeks but not in P21 animals that survived only 48 hours or in the adult animals. Unilateral CHL is associated with changes in CO activity in the AVCN and may affect MSO dendritic length in younger animals.  (+info)

Diagnostic utility of laser-Doppler vibrometry in conductive hearing loss with normal tympanic membrane. (7/130)

HYPOTHESIS: It was hypothesized that laser-Doppler vibrometry measurements of umbo velocity in aerated middle ears with conductive loss can differentiate ossicular interruptions, stapes fixations, and mallear fixations. More generally, we hypothesize that laser-Doppler vibrometry measurements of umbo velocity can give information about how differences in the impedance that the ossicles work against affect middle-ear function. BACKGROUND: Laser-Doppler vibrometry is a well-established research tool for exploring middle-ear function. The authors wished to investigate its potential as a clinical tool for differential diagnosis of the cause of conductive hearing loss. METHODS: Laser-Doppler vibrometry was used to investigate the relationship between the sound-induced velocity of the tympanic membrane at the umbo and the cause of conductive hearing loss when the tympanic membrane was normal and the middle ear was aerated. The results of measurements in 17 adult ears before exploratory tympanotomy were compared with the surgically determined cause of the hearing loss. The authors also measured the motion of the umbo in 10 patients who had undergone successful small-fenestra stapedectomy procedures. In all the studied ears, pure-tone audiograms were measured at the time of laser-Doppler vibrometry testing. RESULTS: There were clear statistical differences between the umbo velocity in normal ears and in ears with different ossicular pathologic conditions. There was also a clear separation of the results between ears with ossicular interruptions and ossicular fixation. The pattern of laser-Doppler vibrometry measurements in poststapedectomy ears approximated the pattern in ears with ossicular interruptions. CONCLUSION: Comparison of laser-Doppler vibrometry results and audiometry may be a sensitive and selective indicator of ossicular pathologic conditions as well as a useful tool for investigating middle ear function.  (+info)

Otoacoustic emissions at different click intensities: invariant and subject-dependent features. (8/130)

A study of click-evoked otoacoustic emissions (CEOAEs) elicited at stimulation intensities from 35 to >80 dB was carried out by recurrence quantification analysis on signals from both normal and hearing-impaired subjects. In normal subjects, a clear scaling of determinism with increasing stimulation intensity was observed in the click intensity range from 41 to 59 dB. Outside that range and, in particular, above its upper end, subject-dependent features appeared in the form of different maximal levels of determinism. A comparative analysis of responses from hearing-impaired subjects with conductive hearing losses and sensorineural hearing losses suggested that the principal contributor to this behavior is the middle ear and allowed us to discriminate the two pathologies solely on the basis of CEOAEs. These observations are consistent with a simple phenomenological model of the auditory periphery in which different functional modules are sequentially recruited at increasing stimulus intensities, with a consequent rise in CEOAE coherence.  (+info)

Hearing loss is a partial or total inability to hear sounds in one or both ears. It can occur due to damage to the structures of the ear, including the outer ear, middle ear, inner ear, or nerve pathways that transmit sound to the brain. The degree of hearing loss can vary from mild (difficulty hearing soft sounds) to severe (inability to hear even loud sounds). Hearing loss can be temporary or permanent and may be caused by factors such as exposure to loud noises, genetics, aging, infections, trauma, or certain medical conditions. It is important to note that hearing loss can have significant impacts on a person's communication abilities, social interactions, and overall quality of life.

Sensorineural hearing loss (SNHL) is a type of hearing impairment that occurs due to damage to the inner ear (cochlea) or to the nerve pathways from the inner ear to the brain. It can be caused by various factors such as aging, exposure to loud noises, genetics, certain medical conditions (like diabetes and heart disease), and ototoxic medications.

SNHL affects the ability of the hair cells in the cochlea to convert sound waves into electrical signals that are sent to the brain via the auditory nerve. As a result, sounds may be perceived as muffled, faint, or distorted, making it difficult to understand speech, especially in noisy environments.

SNHL is typically permanent and cannot be corrected with medication or surgery, but hearing aids or cochlear implants can help improve communication and quality of life for those affected.

Noise-induced hearing loss (NIHL) is a type of sensorineural hearing loss that occurs due to exposure to harmful levels of noise. The damage can be caused by a one-time exposure to an extremely loud sound or by continuous exposure to lower level sounds over time. NIHL can affect people of all ages and can cause permanent damage to the hair cells in the cochlea, leading to hearing loss, tinnitus (ringing in the ears), and difficulty understanding speech in noisy environments. Prevention measures include avoiding excessive noise exposure, wearing hearing protection, and taking regular breaks from noisy activities.

A hearing test is a procedure used to evaluate a person's ability to hear different sounds, pitches, or frequencies. It is performed by a hearing healthcare professional in a sound-treated booth or room with calibrated audiometers. The test measures a person's hearing sensitivity at different frequencies and determines the quietest sounds they can hear, known as their hearing thresholds.

There are several types of hearing tests, including:

1. Pure Tone Audiometry (PTA): This is the most common type of hearing test, where the person is presented with pure tones at different frequencies and volumes through headphones or ear inserts. The person indicates when they hear the sound by pressing a button or raising their hand.
2. Speech Audiometry: This test measures a person's ability to understand speech at different volume levels. The person is asked to repeat words presented to them in quiet and in background noise.
3. Tympanometry: This test measures the function of the middle ear by creating variations in air pressure in the ear canal. It can help identify issues such as fluid buildup or a perforated eardrum.
4. Acoustic Reflex Testing: This test measures the body's natural response to loud sounds and can help identify the location of damage in the hearing system.
5. Otoacoustic Emissions (OAEs): This test measures the sound that is produced by the inner ear when it is stimulated by a sound. It can help identify cochlear damage or abnormalities.

Hearing tests are important for diagnosing and monitoring hearing loss, as well as identifying any underlying medical conditions that may be causing the hearing problems.

Hearing aids are electronic devices designed to improve hearing and speech comprehension for individuals with hearing loss. They consist of a microphone, an amplifier, a speaker, and a battery. The microphone picks up sounds from the environment, the amplifier increases the volume of these sounds, and the speaker sends the amplified sound into the ear. Modern hearing aids often include additional features such as noise reduction, directional microphones, and wireless connectivity to smartphones or other devices. They are programmed to meet the specific needs of the user's hearing loss and can be adjusted for comfort and effectiveness. Hearing aids are available in various styles, including behind-the-ear (BTE), receiver-in-canal (RIC), in-the-ear (ITE), and completely-in-canal (CIC).

Hearing is the ability to perceive sounds by detecting vibrations in the air or other mediums and translating them into nerve impulses that are sent to the brain for interpretation. In medical terms, hearing is defined as the sense of sound perception, which is mediated by the ear and interpreted by the brain. It involves a complex series of processes, including the conduction of sound waves through the outer ear to the eardrum, the vibration of the middle ear bones, and the movement of fluid in the inner ear, which stimulates hair cells to send electrical signals to the auditory nerve and ultimately to the brain. Hearing allows us to communicate with others, appreciate music and sounds, and detect danger or important events in our environment.

Bilateral hearing loss refers to a type of hearing loss that affects both ears equally or to varying degrees. It can be further categorized into two types: sensorineural and conductive hearing loss. Sensorineural hearing loss occurs due to damage to the inner ear or nerve pathways from the inner ear to the brain, while conductive hearing loss happens when sound waves are not properly transmitted through the outer ear canal to the eardrum and middle ear bones. Bilateral hearing loss can result in difficulty understanding speech, localizing sounds, and may impact communication and quality of life. The diagnosis and management of bilateral hearing loss typically involve a comprehensive audiological evaluation and medical assessment to determine the underlying cause and appropriate treatment options.

Conductive hearing loss is a type of hearing loss that occurs when there is a problem with the outer or middle ear. Sound waves are not able to transmit efficiently through the ear canal to the eardrum and the small bones in the middle ear, resulting in a reduction of sound that reaches the inner ear. Causes of conductive hearing loss may include earwax buildup, fluid in the middle ear, a middle ear infection, a hole in the eardrum, or problems with the tiny bones in the middle ear. This type of hearing loss can often be treated through medical intervention or surgery.

Hearing disorders, also known as hearing impairments or auditory impairments, refer to conditions that affect an individual's ability to hear sounds in one or both ears. These disorders can range from mild to profound and may result from genetic factors, aging, exposure to loud noises, infections, trauma, or certain medical conditions.

There are mainly two types of hearing disorders: conductive hearing loss and sensorineural hearing loss. Conductive hearing loss occurs when there is a problem with the outer or middle ear, preventing sound waves from reaching the inner ear. Causes include earwax buildup, fluid in the middle ear, a perforated eardrum, or damage to the ossicles (the bones in the middle ear).

Sensorineural hearing loss, on the other hand, is caused by damage to the inner ear (cochlea) or the nerve pathways from the inner ear to the brain. This type of hearing loss is often permanent and can be due to aging (presbycusis), exposure to loud noises, genetics, viral infections, certain medications, or head injuries.

Mixed hearing loss is a combination of both conductive and sensorineural components. In some cases, hearing disorders can also involve tinnitus (ringing or other sounds in the ears) or vestibular problems that affect balance and equilibrium.

Early identification and intervention for hearing disorders are crucial to prevent further deterioration and to help individuals develop appropriate communication skills and maintain a good quality of life.

High-frequency hearing loss is a type of sensorineural hearing impairment in which the ability to hear and discriminate sounds in the higher frequency range (3000 Hz or above) is diminished. This type of hearing loss can make it difficult for individuals to understand speech, especially in noisy environments, as many consonant sounds fall within this frequency range. High-frequency hearing loss can be caused by various factors including aging, exposure to loud noises, genetics, certain medical conditions, and ototoxic medications. It is typically diagnosed through a series of hearing tests, such as pure tone audiometry, and may be treated with hearing aids or other assistive listening devices.

Audiometry is the testing of a person's ability to hear different sounds, pitches, or frequencies. It is typically conducted using an audiometer, a device that emits tones at varying volumes and frequencies. The person being tested wears headphones and indicates when they can hear the tone by pressing a button or raising their hand.

There are two main types of audiometry: pure-tone audiometry and speech audiometry. Pure-tone audiometry measures a person's ability to hear different frequencies at varying volumes, while speech audiometry measures a person's ability to understand spoken words at different volumes and in the presence of background noise.

The results of an audiometry test are typically plotted on an audiogram, which shows the quietest sounds that a person can hear at different frequencies. This information can be used to diagnose hearing loss, determine its cause, and develop a treatment plan.

Sudden hearing loss, also known as sudden sensorineural hearing loss (SSHL), is a type of hearing impairment that occurs suddenly or over a period of up to 3 days. It is typically defined as a hearing reduction of at least 30 decibels in three connected frequencies. The cause of SSHL is often unknown, but it can be associated with viral infections, trauma, neurological disorders, and exposure to certain ototoxic medications. In some cases, the hearing loss may resolve on its own, but prompt medical evaluation and treatment are recommended to improve the chances of recovery. Treatment options include corticosteroids, antiviral medication, and hyperbaric oxygen therapy.

Pure-tone audiometry is a hearing test that measures a person's ability to hear different sounds, pitches, or frequencies. During the test, pure tones are presented to the patient through headphones or ear inserts, and the patient is asked to indicate each time they hear the sound by raising their hand, pressing a button, or responding verbally.

The softest sound that the person can hear at each frequency is recorded as the hearing threshold, and a graph called an audiogram is created to show the results. The audiogram provides information about the type and degree of hearing loss in each ear. Pure-tone audiometry is a standard hearing test used to diagnose and monitor hearing disorders.

Unilateral hearing loss is a type of hearing impairment that affects only one ear. This condition can be either sensorineural or conductive in nature. Sensorineural hearing loss results from damage to the inner ear or nerve pathways leading to the brain, while conductive hearing loss occurs when sound waves are not properly transmitted through the outer or middle ear. Unilateral hearing loss can result in difficulty hearing and understanding speech, particularly in noisy environments, and can also impact communication and quality of life. The cause of unilateral hearing loss can vary and may include factors such as infection, trauma, genetics, or exposure to loud noise. Treatment options depend on the underlying cause and severity of the hearing loss and may include hearing aids, cochlear implants, or surgical intervention.

Occupational noise is defined as exposure to excessive or harmful levels of sound in the workplace that has the potential to cause adverse health effects such as hearing loss, tinnitus, and stress-related symptoms. The measurement of occupational noise is typically expressed in units of decibels (dB), and the permissible exposure limits are regulated by organizations such as the Occupational Safety and Health Administration (OSHA) in the United States.

Exposure to high levels of occupational noise can lead to permanent hearing loss, which is often irreversible. It can also interfere with communication and concentration, leading to decreased productivity and increased risk of accidents. Therefore, it is essential to implement appropriate measures to control and reduce occupational noise exposure in the workplace.

Presbycusis is an age-related hearing loss, typically characterized by the progressive loss of sensitivity to high-frequency sounds. It's a result of natural aging of the auditory system and is often seen as a type of sensorineural hearing loss. The term comes from the Greek words "presbus" meaning old man and "akousis" meaning hearing.

This condition usually develops slowly over many years and can affect both ears equally. Presbycusis can make understanding speech, especially in noisy environments, quite challenging. It's a common condition, and its prevalence increases with age. While it's not reversible, various assistive devices like hearing aids can help manage the symptoms.

Auditory brainstem evoked potentials (ABEPs or BAEPs) are medical tests that measure the electrical activity in the auditory pathway of the brain in response to sound stimulation. The test involves placing electrodes on the scalp and recording the tiny electrical signals generated by the nerve cells in the brainstem as they respond to clicks or tone bursts presented through earphones.

The resulting waveform is analyzed for latency (the time it takes for the signal to travel from the ear to the brain) and amplitude (the strength of the signal). Abnormalities in the waveform can indicate damage to the auditory nerve or brainstem, and are often used in the diagnosis of various neurological conditions such as multiple sclerosis, acoustic neuroma, and brainstem tumors.

The test is non-invasive, painless, and takes only a few minutes to perform. It provides valuable information about the functioning of the auditory pathway and can help guide treatment decisions for patients with hearing or balance disorders.

Deafness is a hearing loss that is so severe that it results in significant difficulty in understanding or comprehending speech, even when using hearing aids. It can be congenital (present at birth) or acquired later in life due to various causes such as disease, injury, infection, exposure to loud noises, or aging. Deafness can range from mild to profound and may affect one ear (unilateral) or both ears (bilateral). In some cases, deafness may be accompanied by tinnitus, which is the perception of ringing or other sounds in the ears.

Deaf individuals often use American Sign Language (ASL) or other forms of sign language to communicate. Some people with less severe hearing loss may benefit from hearing aids, cochlear implants, or other assistive listening devices. Deafness can have significant social, educational, and vocational implications, and early intervention and appropriate support services are critical for optimal development and outcomes.

The cochlea is a part of the inner ear that is responsible for hearing. It is a spiral-shaped structure that looks like a snail shell and is filled with fluid. The cochlea contains hair cells, which are specialized sensory cells that convert sound vibrations into electrical signals that are sent to the brain.

The cochlea has three main parts: the vestibular canal, the tympanic canal, and the cochlear duct. Sound waves enter the inner ear and cause the fluid in the cochlea to move, which in turn causes the hair cells to bend. This bending motion stimulates the hair cells to generate electrical signals that are sent to the brain via the auditory nerve.

The brain then interprets these signals as sound, allowing us to hear and understand speech, music, and other sounds in our environment. Damage to the hair cells or other structures in the cochlea can lead to hearing loss or deafness.

According to the World Health Organization (WHO), "hearing impairment" is defined as "hearing loss greater than 40 decibels (dB) in the better ear in adults or greater than 30 dB in children." Therefore, "Persons with hearing impairments" refers to individuals who have a significant degree of hearing loss that affects their ability to communicate and perform daily activities.

Hearing impairment can range from mild to profound and can be categorized as sensorineural (inner ear or nerve damage), conductive (middle ear problems), or mixed (a combination of both). The severity and type of hearing impairment can impact the communication methods, assistive devices, or accommodations that a person may need.

It is important to note that "hearing impairment" and "deafness" are not interchangeable terms. While deafness typically refers to a profound degree of hearing loss that significantly impacts a person's ability to communicate using sound, hearing impairment can refer to any degree of hearing loss that affects a person's ability to hear and understand speech or other sounds.

Ear protective devices are types of personal protective equipment designed to protect the ears from potential damage or injury caused by excessive noise or pressure changes. These devices typically come in two main forms: earplugs and earmuffs.

Earplugs are small disposable or reusable plugs that are inserted into the ear canal to block out or reduce loud noises. They can be made of foam, rubber, plastic, or other materials and are available in different sizes to fit various ear shapes and sizes.

Earmuffs, on the other hand, are headbands with cups that cover the entire outer ear. The cups are typically made of sound-absorbing materials such as foam or fluid-filled cushions that help to block out noise. Earmuffs can be used in combination with earplugs for added protection.

Both earplugs and earmuffs are commonly used in industrial settings, construction sites, concerts, shooting ranges, and other noisy environments to prevent hearing loss or damage. It is important to choose the right type of ear protective device based on the level and type of noise exposure, as well as individual comfort and fit.

The correction of hearing impairment refers to the various methods and technologies used to improve or restore hearing function in individuals with hearing loss. This can include the use of hearing aids, cochlear implants, and other assistive listening devices. Additionally, speech therapy and auditory training may also be used to help individuals with hearing impairment better understand and communicate with others. In some cases, surgical procedures may also be performed to correct physical abnormalities in the ear or improve nerve function. The goal of correction of hearing impairment is to help individuals with hearing loss better interact with their environment and improve their overall quality of life.

In the context of medicine, particularly in audiology and otolaryngology (ear, nose, and throat specialty), "noise" is defined as unwanted or disturbing sound in the environment that can interfere with communication, rest, sleep, or cognitive tasks. It can also refer to sounds that are harmful to hearing, such as loud machinery noises or music, which can cause noise-induced hearing loss if exposure is prolonged or at high enough levels.

In some medical contexts, "noise" may also refer to non-specific signals or interfering factors in diagnostic tests and measurements that can make it difficult to interpret results accurately.

Functional hearing loss, also known as non-organic or psychogenic hearing loss, is a hearing impairment that is not due to an underlying medical condition or structural damage to the ear. Instead, it is thought to be caused by psychological or emotional factors, such as stress, anxiety, or depression.

In functional hearing loss, the person's hearing ability may appear to fluctuate or vary depending on the situation and their emotional state. They may have difficulty hearing in certain situations or with certain people, but perform better in others. In some cases, they may report hearing sounds that are not present or misinterpret what is being said.

Functional hearing loss can be difficult to diagnose and treat, as there may not be any obvious physical cause for the hearing impairment. A comprehensive evaluation by an audiologist or other healthcare professional is typically necessary to determine the underlying cause of the hearing loss and develop an appropriate treatment plan. Treatment may involve counseling, therapy, or other interventions aimed at addressing the psychological or emotional factors contributing to the hearing loss.

Spontaneous otoacoustic emissions (SOAEs) are low-level sounds that are produced by the inner ear (cochlea) without any external stimulation. They can be recorded in a quiet room using specialized microphones placed inside the ear canal. SOAEs are thought to arise from the motion of the hair cells within the cochlea, which generate tiny currents in response to sound. These currents then cause the surrounding fluid and tissue to vibrate, producing sound waves that can be detected with a microphone.

SOAEs are typically present in individuals with normal hearing, although their presence or absence is not a definitive indicator of hearing ability. They tend to occur at specific frequencies and can vary from person to person. In some cases, SOAEs may be absent or reduced in individuals with hearing loss or damage to the hair cells in the cochlea.

It's worth noting that SOAEs are different from evoked otoacoustic emissions (EOAEs), which are sounds produced by the inner ear in response to external stimuli, such as clicks or tones. Both types of otoacoustic emissions are used in hearing tests and research to assess cochlear function and health.

The inner ear is the innermost part of the ear that contains the sensory organs for hearing and balance. It consists of a complex system of fluid-filled tubes and sacs called the vestibular system, which is responsible for maintaining balance and spatial orientation, and the cochlea, a spiral-shaped organ that converts sound vibrations into electrical signals that are sent to the brain.

The inner ear is located deep within the temporal bone of the skull and is protected by a bony labyrinth. The vestibular system includes the semicircular canals, which detect rotational movements of the head, and the otolith organs (the saccule and utricle), which detect linear acceleration and gravity.

Damage to the inner ear can result in hearing loss, tinnitus (ringing in the ears), vertigo (a spinning sensation), and balance problems.

Central hearing loss is a type of hearing disorder that occurs due to damage or dysfunction in the central auditory pathways of the brain, rather than in the ear itself. This condition can result from various causes, such as stroke, tumors, trauma, infection, or degenerative diseases affecting the brain.

In central hearing loss, the person may have difficulty understanding and processing speech, even when they can hear sounds at normal levels. They might experience problems with sound localization, discriminating between similar sounds, and comprehending complex auditory signals. This type of hearing loss is different from sensorineural or conductive hearing loss, which are related to issues in the outer, middle, or inner ear.

Audiometry, evoked response is a hearing test that measures the brain's response to sound. It is often used to detect hearing loss in infants and young children, as well as in people who are unable to cooperate or communicate during traditional hearing tests.

During the test, electrodes are placed on the scalp to measure the electrical activity produced by the brain in response to sounds presented through earphones. The responses are recorded and analyzed to determine the quietest sounds that can be heard at different frequencies. This information is used to help diagnose and manage hearing disorders.

There are several types of evoked response audiometry, including:

* Auditory Brainstem Response (ABR): measures the electrical activity from the brainstem in response to sound.
* Auditory Steady-State Response (ASSR): measures the brain's response to continuous sounds at different frequencies and loudness levels.
* Auditory Middle Latency Response (AMLR): measures the electrical activity from the auditory cortex in response to sound.

These tests are usually performed in a quiet, sound-treated room and can take several hours to complete.

Tinnitus is the perception of ringing or other sounds in the ears or head when no external sound is present. It can be described as a sensation of hearing sound even when no actual noise is present. The sounds perceived can vary widely, from a whistling, buzzing, hissing, swooshing, to a pulsating sound, and can be soft or loud.

Tinnitus is not a disease itself but a symptom that can result from a wide range of underlying causes, such as hearing loss, exposure to loud noises, ear infections, earwax blockage, head or neck injuries, circulatory system disorders, certain medications, and age-related hearing loss.

Tinnitus can be temporary or chronic, and it may affect one or both ears. While tinnitus is not usually a sign of a serious medical condition, it can significantly impact quality of life and interfere with daily activities, sleep, and concentration.

Acoustic impedance tests are diagnostic procedures used to measure the impedance or resistance of various parts of the ear to sound waves. These tests are often used to assess hearing function and diagnose any issues related to the middle ear, such as fluid buildup or problems with the eardrum.

The most common type of acoustic impedance test is tympanometry, which measures the mobility of the eardrum and the middle ear system by creating variations in air pressure within the ear canal. During this test, a small probe is inserted into the ear canal, and sound waves are generated while the pressure is varied. The resulting measurements provide information about the condition of the middle ear and can help identify any issues that may be affecting hearing.

Another type of acoustic impedance test is acoustic reflex testing, which measures the body's natural response to loud sounds. This involves measuring the contraction of the stapedius muscle in the middle ear, which occurs in response to loud noises. By measuring the strength and timing of this reflex, audiologists can gain additional insights into the functioning of the middle ear and identify any abnormalities that may be present.

Overall, acoustic impedance tests are important tools for diagnosing hearing problems and identifying any underlying issues in the middle ear. They are often used in conjunction with other hearing tests to provide a comprehensive assessment of an individual's hearing function.

Auditory hair cells are specialized sensory receptor cells located in the inner ear, more specifically in the organ of Corti within the cochlea. They play a crucial role in hearing by converting sound vibrations into electrical signals that can be interpreted by the brain.

These hair cells have hair-like projections called stereocilia on their apical surface, which are embedded in a gelatinous matrix. When sound waves reach the inner ear, they cause the fluid within the cochlea to move, which in turn causes the stereocilia to bend. This bending motion opens ion channels at the tips of the stereocilia, allowing positively charged ions (such as potassium) to flow into the hair cells and trigger a receptor potential.

The receptor potential then leads to the release of neurotransmitters at the base of the hair cells, which activate afferent nerve fibers that synapse with these cells. The electrical signals generated by this process are transmitted to the brain via the auditory nerve, where they are interpreted as sound.

There are two types of auditory hair cells: inner hair cells and outer hair cells. Inner hair cells are the primary sensory receptors responsible for transmitting information about sound to the brain. They make direct contact with afferent nerve fibers and are more sensitive to mechanical stimulation than outer hair cells.

Outer hair cells, on the other hand, are involved in amplifying and fine-tuning the mechanical response of the inner ear to sound. They have a unique ability to contract and relax in response to electrical signals, which allows them to adjust the stiffness of their stereocilia and enhance the sensitivity of the cochlea to different frequencies.

Damage or loss of auditory hair cells can lead to hearing impairment or deafness, as these cells cannot regenerate spontaneously in mammals. Therefore, understanding the structure and function of hair cells is essential for developing therapies aimed at treating hearing disorders.

The medical definition of "Education of Hearing Disabled" refers to the specialized education and teaching methods used for individuals who are deaf or hard of hearing. This type of education is designed to help students with hearing loss develop language, communication, academic, and social skills in a way that meets their unique needs. It can include various approaches such as American Sign Language (ASL), oral/aural methods, cued speech, and cochlear implant rehabilitation. The goal of education for the hearing disabled is to provide students with equal access to learning opportunities and help them reach their full potential.

The auditory threshold is the minimum sound intensity or loudness level that a person can detect 50% of the time, for a given tone frequency. It is typically measured in decibels (dB) and represents the quietest sound that a person can hear. The auditory threshold can be affected by various factors such as age, exposure to noise, and certain medical conditions. Hearing tests, such as pure-tone audiometry, are used to measure an individual's auditory thresholds for different frequencies.

Speech perception is the process by which the brain interprets and understands spoken language. It involves recognizing and discriminating speech sounds (phonemes), organizing them into words, and attaching meaning to those words in order to comprehend spoken language. This process requires the integration of auditory information with prior knowledge and context. Factors such as hearing ability, cognitive function, and language experience can all impact speech perception.

Bone conduction is a type of hearing mechanism that involves the transmission of sound vibrations directly to the inner ear through the bones of the skull, bypassing the outer and middle ears. This occurs when sound waves cause the bones in the skull to vibrate, stimulating the cochlea (the spiral cavity of the inner ear) and its hair cells, which convert the mechanical energy of the vibrations into electrical signals that are sent to the brain and interpreted as sound.

Bone conduction is a natural part of the hearing process in humans, but it can also be used artificially through the use of bone-conduction devices, such as hearing aids or headphones, which transmit sound vibrations directly to the skull. This type of transmission can provide improved hearing for individuals with conductive hearing loss, mixed hearing loss, or single-sided deafness, as it bypasses damaged or obstructed outer and middle ears.

Audiology is a branch of science that deals with the study of hearing, balance disorders, and related conditions. It involves the assessment, diagnosis, and treatment of hearing and balance problems using various tests, techniques, and devices. Audiologists are healthcare professionals who specialize in this field and provide services such as hearing evaluations, fitting of hearing aids, and counseling for people with hearing loss or tinnitus (ringing in the ears). They also work closely with other medical professionals to manage complex cases and provide rehabilitation services.

Acoustic stimulation refers to the use of sound waves or vibrations to elicit a response in an individual, typically for the purpose of assessing or treating hearing, balance, or neurological disorders. In a medical context, acoustic stimulation may involve presenting pure tones, speech sounds, or other types of auditory signals through headphones, speakers, or specialized devices such as bone conduction transducers.

The response to acoustic stimulation can be measured using various techniques, including electrophysiological tests like auditory brainstem responses (ABRs) or otoacoustic emissions (OAEs), behavioral observations, or functional imaging methods like fMRI. Acoustic stimulation is also used in therapeutic settings, such as auditory training programs for hearing impairment or vestibular rehabilitation for balance disorders.

It's important to note that acoustic stimulation should be administered under the guidance of a qualified healthcare professional to ensure safety and effectiveness.

Cochlear implantation is a surgical procedure in which a device called a cochlear implant is inserted into the inner ear (cochlea) of a person with severe to profound hearing loss. The implant consists of an external component, which includes a microphone, processor, and transmitter, and an internal component, which includes a receiver and electrode array.

The microphone picks up sounds from the environment and sends them to the processor, which analyzes and converts the sounds into electrical signals. These signals are then transmitted to the receiver, which stimulates the electrode array in the cochlea. The electrodes directly stimulate the auditory nerve fibers, bypassing the damaged hair cells in the inner ear that are responsible for normal hearing.

The brain interprets these electrical signals as sound, allowing the person to perceive and understand speech and other sounds. Cochlear implantation is typically recommended for people who do not benefit from traditional hearing aids and can significantly improve communication, quality of life, and social integration for those with severe to profound hearing loss.

Neonatal screening is a medical procedure in which specific tests are performed on newborn babies within the first few days of life to detect certain congenital or inherited disorders that are not otherwise clinically apparent at birth. These conditions, if left untreated, can lead to serious health problems, developmental delays, or even death.

The primary goal of neonatal screening is to identify affected infants early so that appropriate treatment and management can be initiated as soon as possible, thereby improving their overall prognosis and quality of life. Commonly screened conditions include phenylketonuria (PKU), congenital hypothyroidism, galactosemia, maple syrup urine disease, sickle cell disease, cystic fibrosis, and hearing loss, among others.

Neonatal screening typically involves collecting a small blood sample from the infant's heel (heel stick) or through a dried blood spot card, which is then analyzed using various biochemical, enzymatic, or genetic tests. In some cases, additional tests such as hearing screenings and pulse oximetry for critical congenital heart disease may also be performed.

It's important to note that neonatal screening is not a diagnostic tool but rather an initial step in identifying infants who may be at risk of certain conditions. Positive screening results should always be confirmed with additional diagnostic tests before any treatment decisions are made.

Mixed conductive-sensorineural hearing loss is a type of hearing impairment that involves both conductive and sensorineural components.

Conductive hearing loss occurs when there are problems with the outer or middle ear that prevent sound from being transmitted efficiently to the inner ear. This can be due to various causes, such as damage to the eardrum, blockage in the ear canal, or issues with the bones in the middle ear.

Sensorineural hearing loss, on the other hand, results from damage to the inner ear (cochlea) or the nerve pathways that transmit sound to the brain. This type of hearing loss is typically permanent and can be caused by factors such as aging, exposure to loud noises, genetics, or certain medical conditions.

In mixed conductive-sensorineural hearing loss, there is a combination of both types of impairment. This means that sound transmission is affected by problems in the outer or middle ear, as well as damage to the inner ear or auditory nerve. As a result, a person with this type of hearing loss may have difficulty hearing faint sounds and understanding speech, particularly in noisy environments. Treatment for mixed conductive-sensorineural hearing loss typically involves addressing both the conductive and sensorineural components of the impairment, which may include medical treatment, surgery, or the use of hearing aids.

The temporal bone is a paired bone that is located on each side of the skull, forming part of the lateral and inferior walls of the cranial cavity. It is one of the most complex bones in the human body and has several important structures associated with it. The main functions of the temporal bone include protecting the middle and inner ear, providing attachment for various muscles of the head and neck, and forming part of the base of the skull.

The temporal bone is divided into several parts, including the squamous part, the petrous part, the tympanic part, and the styloid process. The squamous part forms the lateral portion of the temporal bone and articulates with the parietal bone. The petrous part is the most medial and superior portion of the temporal bone and contains the inner ear and the semicircular canals. The tympanic part forms the lower and anterior portions of the temporal bone and includes the external auditory meatus or ear canal. The styloid process is a long, slender projection that extends downward from the inferior aspect of the temporal bone and serves as an attachment site for various muscles and ligaments.

The temporal bone plays a crucial role in hearing and balance, as it contains the structures of the middle and inner ear, including the oval window, round window, cochlea, vestibule, and semicircular canals. The stapes bone, one of the three bones in the middle ear, is entirely encased within the petrous portion of the temporal bone. Additionally, the temporal bone contains important structures for facial expression and sensation, including the facial nerve, which exits the skull through the stylomastoid foramen, a small opening in the temporal bone.

The middle ear is the middle of the three parts of the ear, located between the outer ear and inner ear. It contains three small bones called ossicles (the malleus, incus, and stapes) that transmit and amplify sound vibrations from the eardrum to the inner ear. The middle ear also contains the Eustachian tube, which helps regulate air pressure in the middle ear and protects against infection by allowing fluid to drain from the middle ear into the back of the throat.

The spiral ganglion is a structure located in the inner ear, specifically within the cochlea. It consists of nerve cell bodies that form the sensory component of the auditory nervous system. The spiral ganglion's neurons are bipolar and have peripheral processes that form synapses with hair cells in the organ of Corti, which is responsible for converting sound vibrations into electrical signals.

The central processes of these neurons then coalesce to form the cochlear nerve, which transmits these electrical signals to the brainstem and ultimately to the auditory cortex for processing and interpretation as sound. Damage to the spiral ganglion or its associated neural structures can lead to hearing loss or deafness.

The vestibular aqueduct is a bony canal that runs from the inner ear to the brain. It contains a membranous duct, called the endolymphatic duct, which is filled with a fluid called endolymph. The vestibular aqueduct plays a role in the maintenance of balance and hearing by regulating the pressure and composition of the endolymph. Abnormalities or damage to the vestibular aqueduct can lead to conditions such as endolymphatic hydrops, which can cause symptoms like vertigo, dizziness, and hearing loss.

Speech Audiometry is a hearing test that measures a person's ability to understand and recognize spoken words at different volumes and frequencies. It is used to assess the function of the auditory system, particularly in cases where there is a suspected problem with speech discrimination or understanding spoken language.

The test typically involves presenting lists of words to the patient at varying intensity levels and asking them to repeat what they hear. The examiner may also present sentences with missing words that the patient must fill in. Based on the results, the audiologist can determine the quietest level at which the patient can reliably detect speech and the degree of speech discrimination ability.

Speech Audiometry is often used in conjunction with pure-tone audiometry to provide a more comprehensive assessment of hearing function. It can help identify any specific patterns of hearing loss, such as those caused by nerve damage or cochlear dysfunction, and inform decisions about treatment options, including the need for hearing aids or other assistive devices.

The Organ of Corti is the sensory organ of hearing within the cochlea of the inner ear. It is a structure in the inner spiral sulcus of the cochlear duct and is responsible for converting sound vibrations into electrical signals that are sent to the brain via the auditory nerve.

The Organ of Corti consists of hair cells, which are sensory receptors with hair-like projections called stereocilia on their apical surfaces. These stereocilia are embedded in a gelatinous matrix and are arranged in rows of different heights. When sound vibrations cause the fluid in the cochlea to move, the stereocilia bend, which opens ion channels and triggers nerve impulses that are sent to the brain.

Damage or loss of hair cells in the Organ of Corti can result in hearing loss, making it a critical structure for maintaining normal auditory function.

Labyrinth diseases refer to conditions that affect the inner ear's labyrinth, which is the complex system of fluid-filled channels and sacs responsible for maintaining balance and hearing. These diseases can cause symptoms such as vertigo (a spinning sensation), dizziness, nausea, hearing loss, and tinnitus (ringing in the ears). Examples of labyrinth diseases include Meniere's disease, labyrinthitis, vestibular neuronitis, and benign paroxysmal positional vertigo. Treatment for these conditions varies depending on the specific diagnosis but may include medications, physical therapy, or surgery.

The tympanic membrane, also known as the eardrum, is a thin, cone-shaped membrane that separates the external auditory canal from the middle ear. It serves to transmit sound vibrations from the air to the inner ear, where they are converted into electrical signals that can be interpreted by the brain as sound. The tympanic membrane is composed of three layers: an outer layer of skin, a middle layer of connective tissue, and an inner layer of mucous membrane. It is held in place by several small bones and muscles and is highly sensitive to changes in pressure.

Speech intelligibility is a term used in audiology and speech-language pathology to describe the ability of a listener to correctly understand spoken language. It is a measure of how well speech can be understood by others, and is often assessed through standardized tests that involve the presentation of recorded or live speech at varying levels of loudness and/or background noise.

Speech intelligibility can be affected by various factors, including hearing loss, cognitive impairment, developmental disorders, neurological conditions, and structural abnormalities of the speech production mechanism. Factors related to the speaker, such as speaking rate, clarity, and articulation, as well as factors related to the listener, such as attention, motivation, and familiarity with the speaker or accent, can also influence speech intelligibility.

Poor speech intelligibility can have significant impacts on communication, socialization, education, and employment opportunities, making it an important area of assessment and intervention in clinical practice.

Auditory outer hair cells are specialized sensory receptor cells located in the cochlea of the inner ear. They are part of the organ of Corti and play a crucial role in hearing by converting sound energy into electrical signals that can be interpreted by the brain.

Unlike the more numerous and simpler auditory inner hair cells, outer hair cells are equipped with unique actin-based molecular motors called "motile" or "piezoelectric" properties. These motors enable the outer hair cells to change their shape and length in response to electrical signals, which in turn amplifies the mechanical vibrations of the basilar membrane where they are located. This amplification increases the sensitivity and frequency selectivity of hearing, allowing us to detect and discriminate sounds over a wide range of intensities and frequencies.

Damage or loss of outer hair cells is a common cause of sensorineural hearing loss, which can result from exposure to loud noises, aging, genetics, ototoxic drugs, and other factors. Currently, there are no effective treatments to regenerate or replace damaged outer hair cells, making hearing loss an irreversible condition in most cases.

The cochlear nerve, also known as the auditory nerve, is the sensory nerve that transmits sound signals from the inner ear to the brain. It consists of two parts: the outer spiral ganglion and the inner vestibular portion. The spiral ganglion contains the cell bodies of the bipolar neurons that receive input from hair cells in the cochlea, which is the snail-shaped organ in the inner ear responsible for hearing. These neurons then send their axons to form the cochlear nerve, which travels through the internal auditory meatus and synapses with neurons in the cochlear nuclei located in the brainstem.

Damage to the cochlear nerve can result in hearing loss or deafness, depending on the severity of the injury. Common causes of cochlear nerve damage include acoustic trauma, such as exposure to loud noises, viral infections, meningitis, and tumors affecting the nerve or surrounding structures. In some cases, cochlear nerve damage may be treated with hearing aids, cochlear implants, or other assistive devices to help restore or improve hearing function.

Cochlear diseases refer to conditions that affect the structure or function of the cochlea, which is a part of the inner ear responsible for hearing. These diseases can cause various types and degrees of hearing loss, ranging from mild to profound. Some common cochlear diseases include:

1. Cochlear otosclerosis: A condition where there is abnormal bone growth in the cochlea, which can lead to conductive or sensorineural hearing loss.
2. Cochlear Meniere's disease: A disorder that affects the inner ear and causes vertigo, tinnitus, and fluctuating hearing loss.
3. Cochlear damage due to exposure to loud noises: Prolonged or sudden exposure to loud noises can cause permanent cochlear damage and hearing loss.
4. Presbycusis: Age-related hearing loss that affects the cochlea and other structures of the auditory system.
5. Cochlear nerve tumors: Rare benign or malignant growths on the cochlear nerve can cause hearing loss, tinnitus, and balance problems.
6. Infections: Bacterial or viral infections such as meningitis, labyrinthitis, or otitis media can damage the cochlea and lead to hearing loss.
7. Ototoxicity: Certain medications can be toxic to the cochlea and cause hearing loss, tinnitus, or balance problems.
8. Genetic factors: Inherited genetic mutations can cause various types of cochlear diseases, such as connexin 26 deficiency, Waardenburg syndrome, or Usher syndrome.

It is important to note that early diagnosis and treatment of cochlear diseases can help prevent or minimize hearing loss and other complications.

I must clarify that the term "pedigree" is not typically used in medical definitions. Instead, it is often employed in genetics and breeding, where it refers to the recorded ancestry of an individual or a family, tracing the inheritance of specific traits or diseases. In human genetics, a pedigree can help illustrate the pattern of genetic inheritance in families over multiple generations. However, it is not a medical term with a specific clinical definition.

The Speech Reception Threshold (SRT) test is a hearing assessment used to estimate the softest speech level, typically expressed in decibels (dB), at which a person can reliably detect and repeat back spoken words or sentences. It measures the listener's ability to understand speech in quiet environments and serves as an essential component of a comprehensive audiological evaluation.

During the SRT test, the examiner presents a list of phonetically balanced words or sentences at varying intensity levels, usually through headphones or insert earphones. The patient is then asked to repeat each word or sentence back to the examiner. The intensity level is decreased gradually until the patient can no longer accurately identify the presented stimuli. The softest speech level where the patient correctly repeats 50% of the words or sentences is recorded as their SRT.

The SRT test results help audiologists determine the presence and degree of hearing loss, assess the effectiveness of hearing aids, and monitor changes in hearing sensitivity over time. It is often performed alongside other tests, such as pure-tone audiometry and tympanometry, to provide a comprehensive understanding of an individual's hearing abilities.

Hyperacusis is a hearing disorder characterized by an increased sensitivity to sounds, where certain everyday noises are perceived as being excessively loud or uncomfortable, even painful. This condition can lead to avoidance behaviors and have a negative impact on a person's quality of life. It is different from normal hearing and requires medical evaluation to diagnose and manage.

Connexins are a family of proteins that form the structural units of gap junctions, which are specialized channels that allow for the direct exchange of small molecules and ions between adjacent cells. These channels play crucial roles in maintaining tissue homeostasis, coordinating cellular activities, and enabling communication between cells. In humans, there are 21 different connexin genes that encode for these proteins, with each isoform having unique properties and distributions within the body. Mutations in connexin genes have been linked to a variety of human diseases, including hearing loss, skin disorders, and heart conditions.

Auditory inner hair cells are specialized sensory receptor cells located in the inner ear, more specifically in the organ of Corti within the cochlea. They play a crucial role in hearing by converting mechanical sound energy into electrical signals that can be processed and interpreted by the brain.

Human ears have about 3,500 inner hair cells arranged in one row along the length of the basilar membrane in each cochlea. These hair cells are characterized by their stereocilia, which are hair-like projections on the apical surface that are embedded in a gelatinous matrix called the tectorial membrane.

When sound waves cause the basilar membrane to vibrate, the stereocilia of inner hair cells bend and deflect. This deflection triggers a cascade of biochemical events leading to the release of neurotransmitters at the base of the hair cell. These neurotransmitters then stimulate the afferent auditory nerve fibers (type I fibers) that synapse with the inner hair cells, transmitting the electrical signals to the brain for further processing and interpretation as sound.

Damage or loss of these inner hair cells can lead to significant hearing impairment or deafness, as they are essential for normal auditory function. Currently, there is no effective way to regenerate damaged inner hair cells in humans, making hearing loss due to their damage permanent.

Otoscopy is a medical examination procedure used to evaluate the external auditory canal and tympanic membrane (eardrum). It involves the use of an otoscope, a tool that consists of a lighted speculum attached to a handle. The speculum is inserted into the ear canal, allowing the healthcare provider to visualize and inspect the eardrum for any abnormalities such as perforations, inflammation, fluid accumulation, or foreign bodies. Otoscopy can help diagnose various conditions including ear infections, middle ear disorders, and hearing loss.

I'm sorry for any confusion, but "music" is not a term that has a medical definition. Music is a form of art that uses sound organized in time. It may include elements such as melody, harmony, rhythm, and dynamics. While music can have various psychological and physiological effects on individuals, it is not considered a medical term with a specific diagnosis or treatment application. If you have any questions related to medicine or health, I'd be happy to try to help answer those for you!

Speech discrimination tests are a type of audiological assessment used to measure a person's ability to understand and identify spoken words, typically presented in quiet and/or noisy backgrounds. These tests are used to evaluate the function of the peripheral and central auditory system, as well as speech perception abilities.

During the test, the individual is presented with lists of words or sentences at varying intensity levels and/or signal-to-noise ratios. The person's task is to repeat or identify the words or phrases they hear. The results of the test are used to determine the individual's speech recognition threshold (SRT), which is the softest level at which the person can correctly identify spoken words.

Speech discrimination tests can help diagnose hearing loss, central auditory processing disorders, and other communication difficulties. They can also be used to monitor changes in hearing ability over time, assess the effectiveness of hearing aids or other interventions, and develop communication strategies for individuals with hearing impairments.

Menière disease is an inner ear disorder that is characterized by episodes of vertigo (a spinning sensation), tinnitus (ringing or buzzing in the ear), hearing loss, and aural fullness (a feeling of pressure or blockage in the ear). It is caused by an abnormal accumulation of endolymphatic fluid in the inner ear, which can lead to damage of the vestibular system and cochlea. The exact cause of this fluid buildup is not known, but it may be related to genetics, allergies, or autoimmune disorders. Menière disease is typically a chronic condition, with symptoms that can vary in frequency and severity over time. Treatment options include dietary modifications, diuretics, vestibular rehabilitation therapy, and, in some cases, surgery.

Stria vascularis is a highly vascularized (rich in blood vessels) structure located in the cochlea of the inner ear. It plays a crucial role in the process of hearing by maintaining the endocochlear potential, which is essential for the conversion of sound waves into electrical signals that can be interpreted by the brain. The stria vascularis is composed of three layers: the marginal cells, intermediate cells, and basal cells, which work together to maintain the ionic balance and generate the endocochlear potential. Damage to the stria vascularis can result in hearing loss.

An acoustic neuroma, also known as vestibular schwannoma, is not actually a neuroma but rather a benign (noncancerous) tumor that develops on the vestibular nerve. This nerve is one of the two nerves that transmit sound and balance information from the inner ear to the brain. The tumor arises from an overproduction of Schwann cells, which normally provide a protective covering for the nerve fibers. As the tumor grows, it can press against the hearing and balance nerves, causing symptoms such as hearing loss, ringing in the ear (tinnitus), unsteadiness, and disequilibrium. In some cases, acoustic neuromas can become quite large and cause additional symptoms by pressing on nearby cranial nerves. Treatment options include observation, radiation therapy, or surgical removal of the tumor.

The ear is the sensory organ responsible for hearing and maintaining balance. It can be divided into three parts: the outer ear, middle ear, and inner ear. The outer ear consists of the pinna (the visible part of the ear) and the external auditory canal, which directs sound waves toward the eardrum. The middle ear contains three small bones called ossicles that transmit sound vibrations from the eardrum to the inner ear. The inner ear contains the cochlea, a spiral-shaped organ responsible for converting sound vibrations into electrical signals that are sent to the brain, and the vestibular system, which is responsible for maintaining balance.

Auditory evoked potentials (AEP) are medical tests that measure the electrical activity in the brain in response to sound stimuli. These tests are often used to assess hearing function and neural processing in individuals, particularly those who cannot perform traditional behavioral hearing tests.

There are several types of AEP tests, including:

1. Brainstem Auditory Evoked Response (BAER) or Brainstem Auditory Evoked Potentials (BAEP): This test measures the electrical activity generated by the brainstem in response to a click or tone stimulus. It is often used to assess the integrity of the auditory nerve and brainstem pathways, and can help diagnose conditions such as auditory neuropathy and retrocochlear lesions.
2. Middle Latency Auditory Evoked Potentials (MLAEP): This test measures the electrical activity generated by the cortical auditory areas of the brain in response to a click or tone stimulus. It is often used to assess higher-level auditory processing, and can help diagnose conditions such as auditory processing disorders and central auditory dysfunction.
3. Long Latency Auditory Evoked Potentials (LLAEP): This test measures the electrical activity generated by the cortical auditory areas of the brain in response to a complex stimulus, such as speech. It is often used to assess language processing and cognitive function, and can help diagnose conditions such as learning disabilities and dementia.

Overall, AEP tests are valuable tools for assessing hearing and neural function in individuals who cannot perform traditional behavioral hearing tests or who have complex neurological conditions.

Auditory perception refers to the process by which the brain interprets and makes sense of the sounds we hear. It involves the recognition and interpretation of different frequencies, intensities, and patterns of sound waves that reach our ears through the process of hearing. This allows us to identify and distinguish various sounds such as speech, music, and environmental noises.

The auditory system includes the outer ear, middle ear, inner ear, and the auditory nerve, which transmits electrical signals to the brain's auditory cortex for processing and interpretation. Auditory perception is a complex process that involves multiple areas of the brain working together to identify and make sense of sounds in our environment.

Disorders or impairments in auditory perception can result in difficulties with hearing, understanding speech, and identifying environmental sounds, which can significantly impact communication, learning, and daily functioning.

Ear diseases are medical conditions that affect the ear and its various components, including the outer ear, middle ear, and inner ear. These diseases can cause a range of symptoms, such as hearing loss, tinnitus (ringing in the ears), vertigo (dizziness), ear pain, and discharge. Some common ear diseases include:

1. Otitis externa (swimmer's ear) - an infection or inflammation of the outer ear and ear canal.
2. Otitis media - an infection or inflammation of the middle ear, often caused by a cold or flu.
3. Cholesteatoma - a skin growth that develops in the middle ear behind the eardrum.
4. Meniere's disease - a disorder of the inner ear that can cause vertigo, hearing loss, and tinnitus.
5. Temporomandibular joint (TMJ) disorders - problems with the joint that connects the jawbone to the skull, which can cause ear pain and other symptoms.
6. Acoustic neuroma - a noncancerous tumor that grows on the nerve that connects the inner ear to the brain.
7. Presbycusis - age-related hearing loss.

Treatment for ear diseases varies depending on the specific condition and its severity. It may include medication, surgery, or other therapies. If you are experiencing symptoms of an ear disease, it is important to seek medical attention from a healthcare professional, such as an otolaryngologist (ear, nose, and throat specialist).

The round window ( membrana tympani rotunda) is a small, thin membrane-covered opening located in the inner ear between the middle ear and the cochlea. It serves as one of the two openings that lead into the cochlea, with the other being the oval window.

The round window's primary function is to help regulate and dampen the pressure changes within the cochlea that occur when sound waves reach the inner ear. This is accomplished through the movement of the fluid-filled spaces inside the cochlea (the scala vestibuli and scala tympani) caused by vibrations from the stapes bone, which connects to the oval window.

As the stapes bone moves in response to sound waves, it causes a corresponding motion in the perilymph fluid within the cochlea. This movement then creates pressure changes at the round window, causing it to bulge outward or move inward. The flexibility of the round window allows it to absorb and dissipate these pressure changes, which helps protect the delicate structures inside the inner ear from damage due to excessive pressure buildup.

It is important to note that any damage or dysfunction in the round window can negatively impact hearing ability and cause various hearing disorders.

I'm sorry for any confusion, but an MP3 player is not a medical device or term. An MP3 player is a type of electronic device that can store and play digital media files, including music, audio books, and podcasts. The name "MP3" refers to one of the most common file formats for digital audio.

If you have any questions about medical terminology or concepts, I would be happy to help with those instead!

Perceptual masking, also known as sensory masking or just masking, is a concept in sensory perception that refers to the interference in the ability to detect or recognize a stimulus (the target) due to the presence of another stimulus (the mask). This phenomenon can occur across different senses, including audition and vision.

In the context of hearing, perceptual masking occurs when one sound (the masker) makes it difficult to hear another sound (the target) because the two sounds are presented simultaneously or in close proximity to each other. The masker can make the target sound less detectable, harder to identify, or even completely inaudible.

There are different types of perceptual masking, including:

1. Simultaneous Masking: When the masker and target sounds occur at the same time.
2. Temporal Masking: When the masker sound precedes or follows the target sound by a short period. This type of masking can be further divided into forward masking (when the masker comes before the target) and backward masking (when the masker comes after the target).
3. Informational Masking: A more complex form of masking that occurs when the listener's cognitive processes, such as attention or memory, are affected by the presence of the masker sound. This type of masking can make it difficult to understand speech in noisy environments, even if the signal-to-noise ratio is favorable.

Perceptual masking has important implications for understanding and addressing hearing difficulties, particularly in situations with background noise or multiple sounds occurring simultaneously.

Auditory pathways refer to the series of structures and nerves in the body that are involved in processing sound and transmitting it to the brain for interpretation. The process begins when sound waves enter the ear and cause vibrations in the eardrum, which then move the bones in the middle ear. These movements stimulate hair cells in the cochlea, a spiral-shaped structure in the inner ear, causing them to release neurotransmitters that activate auditory nerve fibers.

The auditory nerve carries these signals to the brainstem, where they are relayed through several additional structures before reaching the auditory cortex in the temporal lobe of the brain. Here, the signals are processed and interpreted as sounds, allowing us to hear and understand speech, music, and other environmental noises.

Damage or dysfunction at any point along the auditory pathway can lead to hearing loss or impairment.

Sound spectrography, also known as voice spectrography, is a diagnostic procedure in which a person's speech sounds are analyzed and displayed as a visual pattern called a spectrogram. This test is used to evaluate voice disorders, speech disorders, and hearing problems. It can help identify patterns of sound production and reveal any abnormalities in the vocal tract or hearing mechanism.

During the test, a person is asked to produce specific sounds or sentences, which are then recorded and analyzed by a computer program. The program breaks down the sound waves into their individual frequencies and amplitudes, and displays them as a series of horizontal lines on a graph. The resulting spectrogram shows how the frequencies and amplitudes change over time, providing valuable information about the person's speech patterns and any underlying problems.

Sound spectrography is a useful tool for diagnosing and treating voice and speech disorders, as well as for researching the acoustic properties of human speech. It can also be used to evaluate hearing aids and other assistive listening devices, and to assess the effectiveness of various treatments for hearing loss and other auditory disorders.

Labyrinthitis is a medical condition characterized by inflammation of the labyrinth, which is the inner ear's balance- and hearing-sensitive system. It is often caused by an infection, such as a viral or bacterial infection, that spreads to the inner ear. The inflammation can affect the delicate structures of the labyrinth, leading to symptoms such as vertigo (a spinning sensation), dizziness, imbalance, hearing loss, and tinnitus (ringing in the ears). Labyrinthitis can be a serious condition that requires medical attention and treatment.

Recessive genes refer to the alleles (versions of a gene) that will only be expressed when an individual has two copies of that particular allele, one inherited from each parent. If an individual inherits one recessive allele and one dominant allele for a particular gene, the dominant allele will be expressed and the recessive allele will have no effect on the individual's phenotype (observable traits).

Recessive genes can still play a role in determining an individual's genetic makeup and can be passed down through generations even if they are not expressed. If two carriers of a recessive gene have children, there is a 25% chance that their offspring will inherit two copies of the recessive allele and exhibit the associated recessive trait.

Examples of genetic disorders caused by recessive genes include cystic fibrosis, sickle cell anemia, and albinism.

Sign language is not considered a medical term, but it is a visual-manual means of communication used by individuals who are deaf or hard of hearing. It combines hand shapes, orientation, and movement of the hands, arms, or body, along with facial expressions and lip patterns. Different sign languages exist in various countries and communities, such as American Sign Language (ASL) and British Sign Language (BSL).

However, I can provide a definition related to medical terminology that involves the use of gestures for communication purposes:

Gesture (in medical context): A bodily action or movement, often used to convey information or communicate. In some medical situations, healthcare professionals may use simple, predefined gestures to elicit responses from patients who have difficulty with verbal communication due to conditions like aphasia, dysarthria, or being in a coma. These gestures can be part of a more comprehensive system called "gesture-based communication" or "nonverbal communication."

For sign language specifically, you may consult resources related to linguistics, special education, or deaf studies for detailed definitions and descriptions.

The vestibulocochlear nerve, also known as the 8th cranial nerve, is responsible for transmitting sound and balance information from the inner ear to the brain. Vestibulocochlear nerve diseases refer to conditions that affect this nerve and can result in hearing loss, vertigo, and balance problems.

These diseases can be caused by various factors, including genetics, infection, trauma, tumors, or degeneration. Some examples of vestibulocochlear nerve diseases include:

1. Vestibular neuritis: an inner ear infection that causes severe vertigo, nausea, and balance problems.
2. Labyrinthitis: an inner ear infection that affects both the vestibular and cochlear nerves, causing vertigo, hearing loss, and tinnitus.
3. Acoustic neuroma: a benign tumor that grows on the vestibulocochlear nerve, causing hearing loss, tinnitus, and balance problems.
4. Meniere's disease: a inner ear disorder that causes vertigo, hearing loss, tinnitus, and a feeling of fullness in the ear.
5. Ototoxicity: damage to the inner ear caused by certain medications or chemicals that can result in hearing loss and balance problems.
6. Vestibular migraine: a type of migraine that is associated with vertigo, dizziness, and balance problems.

Treatment for vestibulocochlear nerve diseases varies depending on the specific condition and its severity. It may include medication, physical therapy, surgery, or a combination of these approaches.

Otosclerosis is a medical condition that affects the bones in the middle ear. It is characterized by the abnormal growth and hardening (sclerosis) of the otosclerotic bone near the stapes footplate, one of the tiny bones in the middle ear (ossicles). This abnormal bone growth can cause stiffness or fixation of the stapes bone, preventing it from vibrating properly and leading to conductive hearing loss. In some cases, otosclerosis may also result in sensorineural hearing loss due to involvement of the inner ear structures. The exact cause of otosclerosis is not fully understood, but it is believed to have a genetic component and can sometimes be associated with pregnancy. Treatment options for otosclerosis include hearing aids or surgical procedures like stapedectomy or stapedotomy to bypass or remove the affected bone and improve hearing.

A syndrome, in medical terms, is a set of symptoms that collectively indicate or characterize a disease, disorder, or underlying pathological process. It's essentially a collection of signs and/or symptoms that frequently occur together and can suggest a particular cause or condition, even though the exact physiological mechanisms might not be fully understood.

For example, Down syndrome is characterized by specific physical features, cognitive delays, and other developmental issues resulting from an extra copy of chromosome 21. Similarly, metabolic syndromes like diabetes mellitus type 2 involve a group of risk factors such as obesity, high blood pressure, high blood sugar, and abnormal cholesterol or triglyceride levels that collectively increase the risk of heart disease, stroke, and diabetes.

It's important to note that a syndrome is not a specific diagnosis; rather, it's a pattern of symptoms that can help guide further diagnostic evaluation and management.

Otitis media with effusion (OME), also known as serous otitis media or glue ear, is a medical condition characterized by the presence of fluid in the middle ear without signs or symptoms of acute ear infection. The fluid accumulation occurs due to the dysfunction of the Eustachian tube, which results in negative pressure and subsequent accumulation of sterile fluid within the middle ear space.

OME can lead to hearing difficulties, especially in children, as the fluid buildup impairs sound conduction through the ossicles in the middle ear. Symptoms may include mild hearing loss, tinnitus (ringing in the ears), and a sensation of fullness or pressure in the affected ear. In some cases, OME can resolve on its own within a few weeks or months; however, persistent cases might require medical intervention, such as placement of tympanostomy tubes (ear tubes) to drain the fluid and restore hearing.

Phonetics is not typically considered a medical term, but rather a branch of linguistics that deals with the sounds of human speech. It involves the study of how these sounds are produced, transmitted, and received, as well as how they are used to convey meaning in different languages. However, there can be some overlap between phonetics and certain areas of medical research, such as speech-language pathology or audiology, which may study the production, perception, and disorders of speech sounds for diagnostic or therapeutic purposes.

Vertigo is a specific type of dizziness characterized by the sensation that you or your surroundings are spinning or moving, even when you're perfectly still. It's often caused by issues with the inner ear or the balance-sensing systems of the body. Vertigo can be brought on by various conditions, such as benign paroxysmal positional vertigo (BPPV), labyrinthitis, vestibular neuritis, Meniere's disease, and migraines. In some cases, vertigo may also result from head or neck injuries, brain disorders like stroke or tumors, or certain medications. Treatment for vertigo depends on the underlying cause and can include specific exercises, medication, or surgery in severe cases.

A mutation is a permanent change in the DNA sequence of an organism's genome. Mutations can occur spontaneously or be caused by environmental factors such as exposure to radiation, chemicals, or viruses. They may have various effects on the organism, ranging from benign to harmful, depending on where they occur and whether they alter the function of essential proteins. In some cases, mutations can increase an individual's susceptibility to certain diseases or disorders, while in others, they may confer a survival advantage. Mutations are the driving force behind evolution, as they introduce new genetic variability into populations, which can then be acted upon by natural selection.

Vestibular diseases are a group of disorders that affect the vestibular system, which is responsible for maintaining balance and spatial orientation. The vestibular system includes the inner ear and parts of the brain that process sensory information related to movement and position.

These diseases can cause symptoms such as vertigo (a spinning sensation), dizziness, imbalance, nausea, and visual disturbances. Examples of vestibular diseases include:

1. Benign paroxysmal positional vertigo (BPPV): a condition in which small crystals in the inner ear become dislodged and cause brief episodes of vertigo triggered by changes in head position.
2. Labyrinthitis: an inner ear infection that can cause sudden onset of vertigo, hearing loss, and tinnitus (ringing in the ears).
3. Vestibular neuronitis: inflammation of the vestibular nerve that causes severe vertigo, nausea, and imbalance but typically spares hearing.
4. Meniere's disease: a disorder characterized by recurrent episodes of vertigo, tinnitus, hearing loss, and a feeling of fullness in the affected ear.
5. Vestibular migraine: a type of migraine that includes vestibular symptoms such as dizziness, imbalance, and disorientation.
6. Superior canal dehiscence syndrome: a condition in which there is a thinning or absence of bone over the superior semicircular canal in the inner ear, leading to vertigo, sound- or pressure-induced dizziness, and hearing loss.
7. Bilateral vestibular hypofunction: reduced function of both vestibular systems, causing chronic imbalance, unsteadiness, and visual disturbances.

Treatment for vestibular diseases varies depending on the specific diagnosis but may include medication, physical therapy, surgery, or a combination of these approaches.

Prosthesis fitting is the process of selecting, designing, fabricating, and fitting a prosthetic device to replace a part of an individual's body that is missing due to congenital absence, illness, injury, or amputation. The primary goal of prosthesis fitting is to restore the person's physical function, mobility, and independence, as well as improve their overall quality of life.

The process typically involves several steps:

1. Assessment: A thorough evaluation of the patient's medical history, physical condition, and functional needs is conducted to determine the most appropriate type of prosthesis. This may include measurements, castings, or digital scans of the residual limb.

2. Design: Based on the assessment, a customized design plan is created for the prosthetic device, taking into account factors such as the patient's lifestyle, occupation, and personal preferences.

3. Fabrication: The prosthesis is manufactured using various materials, components, and techniques to meet the specific requirements of the patient. This may involve the use of 3D printing, computer-aided design (CAD), or traditional handcrafting methods.

4. Fitting: Once the prosthesis is fabricated, it is carefully fitted to the patient's residual limb, ensuring optimal comfort, alignment, and stability. Adjustments may be made as needed to achieve the best fit and function.

5. Training: The patient receives training on how to use and care for their new prosthetic device, including exercises to strengthen the residual limb and improve overall mobility. Follow-up appointments are scheduled to monitor progress, make any necessary adjustments, and provide ongoing support.

Psychoacoustics is a branch of psychophysics that deals with the study of the psychological and physiological responses to sound. It involves understanding how people perceive, interpret, and react to different sounds, including speech, music, and environmental noises. This field combines knowledge from various areas such as psychology, acoustics, physics, and engineering to investigate the relationship between physical sound characteristics and human perception. Research in psychoacoustics has applications in fields like hearing aid design, noise control, music perception, and communication systems.

Cochlear implants are medical devices that are surgically implanted in the inner ear to help restore hearing in individuals with severe to profound hearing loss. These devices bypass the damaged hair cells in the inner ear and directly stimulate the auditory nerve, allowing the brain to interpret sound signals. Cochlear implants consist of two main components: an external processor that picks up and analyzes sounds from the environment, and an internal receiver/stimulator that receives the processed information and sends electrical impulses to the auditory nerve. The resulting patterns of electrical activity are then perceived as sound by the brain. Cochlear implants can significantly improve communication abilities, language development, and overall quality of life for individuals with profound hearing loss.

Occupational exposure refers to the contact of an individual with potentially harmful chemical, physical, or biological agents as a result of their job or occupation. This can include exposure to hazardous substances such as chemicals, heavy metals, or dusts; physical agents such as noise, radiation, or ergonomic stressors; and biological agents such as viruses, bacteria, or fungi.

Occupational exposure can occur through various routes, including inhalation, skin contact, ingestion, or injection. Prolonged or repeated exposure to these hazards can increase the risk of developing acute or chronic health conditions, such as respiratory diseases, skin disorders, neurological damage, or cancer.

Employers have a legal and ethical responsibility to minimize occupational exposures through the implementation of appropriate control measures, including engineering controls, administrative controls, personal protective equipment, and training programs. Regular monitoring and surveillance of workers' health can also help identify and prevent potential health hazards in the workplace.

Otologic surgical procedures refer to a range of surgeries performed on the ear or its related structures. These procedures are typically conducted by otologists, who are specialists trained in diagnosing and treating conditions that affect the ears, balance system, and related nerves. The goal of otologic surgery can vary from repairing damaged bones in the middle ear to managing hearing loss, tumors, or chronic infections. Some common otologic surgical procedures include:

1. Stapedectomy/Stapedotomy: These are procedures used to treat otosclerosis, a condition where the stapes bone in the middle ear becomes fixed and causes conductive hearing loss. The surgeon creates an opening in the stapes footplate (stapedotomy) or removes the entire stapes bone (stapedectomy) and replaces it with a prosthetic device to improve sound conduction.
2. Myringoplasty/Tympanoplasty: These are surgeries aimed at repairing damaged eardrums (tympanic membrane). A myringoplasty involves grafting a piece of tissue over the perforation in the eardrum, while a tympanoplasty includes both eardrum repair and reconstruction of the middle ear bones if necessary.
3. Mastoidectomy: This procedure involves removing the mastoid air cells, which are located in the bony prominence behind the ear. A mastoidectomy is often performed to treat chronic mastoiditis, cholesteatoma, or complications from middle ear infections.
4. Ossiculoplasty: This procedure aims to reconstruct and improve the function of the ossicles (middle ear bones) when they are damaged due to various reasons such as infection, trauma, or congenital conditions. The surgeon uses prosthetic devices made from plastic, metal, or even bone to replace or support the damaged ossicles.
5. Cochlear implantation: This is a surgical procedure that involves placing an electronic device inside the inner ear to help individuals with severe to profound hearing loss. The implant consists of an external processor and internal components that directly stimulate the auditory nerve, bypassing the damaged hair cells in the cochlea.
6. Labyrinthectomy: This procedure involves removing the balance-sensing structures (vestibular system) inside the inner ear to treat severe vertigo or dizziness caused by conditions like Meniere's disease when other treatments have failed.
7. Acoustic neuroma removal: An acoustic neuroma is a benign tumor that grows on the vestibulocochlear nerve, which connects the inner ear to the brain. Surgical removal of the tumor is necessary to prevent hearing loss, balance problems, and potential neurological complications.

These are just a few examples of the various surgical procedures performed by otolaryngologists (ear, nose, and throat specialists) to treat conditions affecting the ear and surrounding structures. Each procedure has its specific indications, benefits, risks, and postoperative care requirements. Patients should consult with their healthcare providers to discuss the most appropriate treatment options for their individual needs.

Occupational diseases are health conditions or illnesses that occur as a result of exposure to hazards in the workplace. These hazards can include physical, chemical, and biological agents, as well as ergonomic factors and work-related psychosocial stressors. Examples of occupational diseases include respiratory illnesses caused by inhaling dust or fumes, hearing loss due to excessive noise exposure, and musculoskeletal disorders caused by repetitive movements or poor ergonomics. The development of an occupational disease is typically related to the nature of the work being performed and the conditions in which it is carried out. It's important to note that these diseases can be prevented or minimized through proper risk assessment, implementation of control measures, and adherence to safety regulations.

DNA Mutational Analysis is a laboratory test used to identify genetic variations or changes (mutations) in the DNA sequence of a gene. This type of analysis can be used to diagnose genetic disorders, predict the risk of developing certain diseases, determine the most effective treatment for cancer, or assess the likelihood of passing on an inherited condition to offspring.

The test involves extracting DNA from a patient's sample (such as blood, saliva, or tissue), amplifying specific regions of interest using polymerase chain reaction (PCR), and then sequencing those regions to determine the precise order of nucleotide bases in the DNA molecule. The resulting sequence is then compared to reference sequences to identify any variations or mutations that may be present.

DNA Mutational Analysis can detect a wide range of genetic changes, including single-nucleotide polymorphisms (SNPs), insertions, deletions, duplications, and rearrangements. The test is often used in conjunction with other diagnostic tests and clinical evaluations to provide a comprehensive assessment of a patient's genetic profile.

It is important to note that not all mutations are pathogenic or associated with disease, and the interpretation of DNA Mutational Analysis results requires careful consideration of the patient's medical history, family history, and other relevant factors.

Sound localization is the ability of the auditory system to identify the location or origin of a sound source in the environment. It is a crucial aspect of hearing and enables us to navigate and interact with our surroundings effectively. The process involves several cues, including time differences in the arrival of sound to each ear (interaural time difference), differences in sound level at each ear (interaural level difference), and spectral information derived from the filtering effects of the head and external ears on incoming sounds. These cues are analyzed by the brain to determine the direction and distance of the sound source, allowing for accurate localization.

Loudness perception refers to the subjective experience of the intensity or volume of a sound, which is a psychological response to the physical property of sound pressure level. It is a measure of how loud or soft a sound seems to an individual, and it can be influenced by various factors such as frequency, duration, and the context in which the sound is heard.

The perception of loudness is closely related to the concept of sound intensity, which is typically measured in decibels (dB). However, while sound intensity is an objective physical measurement, loudness is a subjective experience that can vary between individuals and even for the same individual under different listening conditions.

Loudness perception is a complex process that involves several stages of auditory processing, including mechanical transduction of sound waves by the ear, neural encoding of sound information in the auditory nerve, and higher-level cognitive processes that interpret and modulate the perceived loudness of sounds. Understanding the mechanisms underlying loudness perception is important for developing hearing aids, cochlear implants, and other assistive listening devices, as well as for diagnosing and treating various hearing disorders.

Usher Syndromes are a group of genetic disorders that are characterized by hearing loss and visual impairment due to retinitis pigmentosa. They are the most common cause of deafblindness in developed countries. There are three types of Usher Syndromes (Type 1, Type 2, and Type 3) which differ in the age of onset, severity, and progression of hearing loss and vision loss.

Type 1 Usher Syndrome is the most severe form, with profound deafness present at birth or within the first year of life, and retinitis pigmentosa leading to significant vision loss by the teenage years. Type 2 Usher Syndrome is characterized by moderate to severe hearing loss beginning in childhood and vision loss due to retinitis pigmentosa starting in adolescence or early adulthood. Type 3 Usher Syndrome has progressive hearing loss that begins in adolescence and vision loss due to retinitis pigmentosa starting in the third decade of life.

The diagnosis of Usher Syndromes is based on a combination of clinical examination, audiological evaluation, and genetic testing. There is currently no cure for Usher Syndromes, but various assistive devices and therapies can help manage the symptoms and improve quality of life.

Consanguinity is a medical and genetic term that refers to the degree of genetic relationship between two individuals who share common ancestors. Consanguineous relationships exist when people are related by blood, through a common ancestor or siblings who have children together. The closer the relationship between the two individuals, the higher the degree of consanguinity.

The degree of consanguinity is typically expressed as a percentage or fraction, with higher values indicating a closer genetic relationship. For example, first-degree relatives, such as parents and children or full siblings, share approximately 50% of their genes and have a consanguinity coefficient of 0.25 (or 25%).

Consanguinity can increase the risk of certain genetic disorders and birth defects in offspring due to the increased likelihood of sharing harmful recessive genes. The risks depend on the degree of consanguinity, with closer relationships carrying higher risks. It is important for individuals who are planning to have children and have a history of consanguinity to consider genetic counseling and testing to assess their risk of passing on genetic disorders.

Pitch perception is the ability to identify and discriminate different frequencies or musical notes. It is the way our auditory system interprets and organizes sounds based on their highness or lowness, which is determined by the frequency of the sound waves. A higher pitch corresponds to a higher frequency, while a lower pitch corresponds to a lower frequency. Pitch perception is an important aspect of hearing and is crucial for understanding speech, enjoying music, and localizing sounds in our environment. It involves complex processing in the inner ear and auditory nervous system.

Speech acoustics is a subfield of acoustic phonetics that deals with the physical properties of speech sounds, such as frequency, amplitude, and duration. It involves the study of how these properties are produced by the vocal tract and perceived by the human ear. Speech acousticians use various techniques to analyze and measure the acoustic signals produced during speech, including spectral analysis, formant tracking, and pitch extraction. This information is used in a variety of applications, such as speech recognition, speaker identification, and hearing aid design.

The ear ossicles are the three smallest bones in the human body, which are located in the middle ear. They play a crucial role in the process of hearing by transmitting and amplifying sound vibrations from the eardrum to the inner ear. The three ear ossicles are:

1. Malleus (hammer): The largest of the three bones, it is shaped like a hammer and connects to the eardrum.
2. Incus (anvil): The middle-sized bone, it looks like an anvil and connects the malleus to the stapes.
3. Stapes (stirrup): The smallest and lightest bone in the human body, it resembles a stirrup and transmits vibrations from the incus to the inner ear.

Together, these tiny bones work to efficiently transfer sound waves from the air to the fluid-filled cochlea of the inner ear, enabling us to hear.

Cochlear microphonic potentials (CMs) are electrical responses that originate from the hair cells in the cochlea, which is a part of the inner ear responsible for hearing. These potentials can be recorded using an electrode placed near the cochlea in response to sound stimulation.

The CMs are considered to be a passive response of the hair cells to the mechanical deflection caused by sound waves. They represent the receptor potential of the outer hair cells and are directly proportional to the sound pressure level. Unlike other electrical responses in the cochlea, such as the action potentials generated by the auditory nerve fibers, CMs do not require the presence of neurotransmitters or synaptic transmission.

Cochlear microphonic potentials have been used in research to study the biophysical properties of hair cells and their response to different types of sound stimuli. However, they are not typically used in clinical audiology due to their small amplitude and susceptibility to interference from other electrical signals in the body.

Dominant genes refer to the alleles (versions of a gene) that are fully expressed in an individual's phenotype, even if only one copy of the gene is present. In dominant inheritance patterns, an individual needs only to receive one dominant allele from either parent to express the associated trait. This is in contrast to recessive genes, where both copies of the gene must be the recessive allele for the trait to be expressed. Dominant genes are represented by uppercase letters (e.g., 'A') and recessive genes by lowercase letters (e.g., 'a'). If an individual inherits one dominant allele (A) from either parent, they will express the dominant trait (A).

Stereocilia are hair-like projections found in the inner ear, more specifically in the organ of Corti within the cochlea. They are present on the sensory cells known as hair cells and are involved in hearing by converting sound vibrations into electrical signals that can be transmitted to the brain.

Stereocilia are arranged in rows of graded height, with the tallest ones located near the opening of the cochlea (the base) and the shortest ones closer to the apex. When sound waves reach the inner ear, they cause the fluid within the cochlea to move, which in turn causes stereocilia to bend. This bending action triggers the release of chemical signals that stimulate nerve fibers connected to the hair cells, ultimately transmitting information about the sound to the brain.

Damage or loss of stereocilia can result in hearing impairment or deafness, as seen in various forms of hearing disorders and age-related hearing loss.

Tympanic membrane perforation, also known as a ruptured eardrum, is a tear or hole in the tympanic membrane, which separates the outer ear canal and the middle ear. The tympanic membrane plays a crucial role in hearing by transmitting sound vibrations from the outer ear to the inner ear. A perforation can result from various causes such as infection, trauma, pressure changes, or explosive blasts, leading to symptoms like hearing loss, tinnitus, vertigo, and ear discharge. The extent and location of the perforation determine the severity of the symptoms and the course of treatment, which may include observation, antibiotics, or surgical repair.

The stapes is the smallest bone in the human body, which is a part of the middle ear. It is also known as the "stirrup" because of its U-shaped structure. The stapes connects the inner ear to the middle ear, transmitting sound vibrations from the ear drum to the inner ear. More specifically, it is the third bone in the series of three bones (the ossicles) that conduct sound waves from the air to the fluid-filled inner ear.

In the context of medicine, particularly in the field of auscultation (the act of listening to the internal sounds of the body), "sound" refers to the noises produced by the functioning of the heart, lungs, and other organs. These sounds are typically categorized into two types:

1. **Bradyacoustic sounds**: These are low-pitched sounds that are heard when there is a turbulent flow of blood or when two body structures rub against each other. An example would be the heart sound known as "S1," which is produced by the closure of the mitral and tricuspid valves at the beginning of systole (contraction of the heart's ventricles).

2. **High-pitched sounds**: These are sharper, higher-frequency sounds that can provide valuable diagnostic information. An example would be lung sounds, which include breath sounds like those heard during inhalation and exhalation, as well as adventitious sounds like crackles, wheezes, and pleural friction rubs.

It's important to note that these medical "sounds" are not the same as the everyday definition of sound, which refers to the sensation produced by stimulation of the auditory system by vibrations.

## I am not aware of a medical definition for the term "chinchilla."

A chinchilla is actually a type of rodent that is native to South America. They have thick, soft fur and are often kept as exotic pets or used in laboratory research. If you're looking for information about chinchillas in a medical context, such as their use in research or any potential health concerns related to keeping them as pets, I would be happy to help you try to find more information on those topics.

The auditory cortex is the region of the brain that is responsible for processing and analyzing sounds, including speech. It is located in the temporal lobe of the cerebral cortex, specifically within the Heschl's gyrus and the surrounding areas. The auditory cortex receives input from the auditory nerve, which carries sound information from the inner ear to the brain.

The auditory cortex is divided into several subregions that are responsible for different aspects of sound processing, such as pitch, volume, and location. These regions work together to help us recognize and interpret sounds in our environment, allowing us to communicate with others and respond appropriately to our surroundings. Damage to the auditory cortex can result in hearing loss or difficulty understanding speech.

Vestibular function tests are a series of diagnostic assessments used to determine the functionality and health of the vestibular system, which is responsible for maintaining balance and spatial orientation. These tests typically include:

1. **Caloric Testing:** This test evaluates the response of each ear to stimulation with warm and cold water or air. The resulting responses are recorded and analyzed to assess the function of the horizontal semicircular canals and the vestibular-ocular reflex (VOR).

2. **Rotary Chair Testing:** This test measures how well the vestibular system adapts to different speeds of rotation. The patient sits in a chair that moves in a controlled, consistent manner while their eye movements are recorded.

3. **Videonystagmography (VNG):** This test uses video goggles to record eye movements in response to various stimuli, such as changes in head position, temperature, and visual environment.

4. **Electronystagmography (ENG):** Similar to VNG, this test records eye movements but uses electrodes placed near the eyes instead of video goggles.

5. **Dix-Hallpike Test:** This is a clinical maneuver used to diagnose benign paroxysmal positional vertigo (BPPV). It involves rapidly moving the patient's head from an upright position to a position where their head is hanging off the end of the examination table.

6. **Head Shaking Test:** This test involves shaking the head back and forth for 15-20 seconds and then observing the patient's eye movements for nystagmus (involuntary eye movement).

These tests help diagnose various vestibular disorders, including benign paroxysmal positional vertigo, labyrinthitis, vestibular neuritis, Meniere's disease, and other balance disorders.

The cochlear duct, also known as the scala media, is a membranous duct located within the cochlea of the inner ear. It is one of three fluid-filled compartments in the cochlea, along with the vestibular duct (scala vestibuli) and the tympanic duct (scala tympani).

The cochlear duct contains endolymph, a specialized fluid that carries electrical signals to the auditory nerve. The organ of Corti, which is responsible for converting sound vibrations into electrical signals, is located within the cochlear duct.

The cochlear duct runs along the length of the cochlea and is separated from the vestibular duct by Reissner's membrane and from the tympanic duct by the basilar membrane. These membranes help to create a highly sensitive and selective environment for sound perception, allowing us to hear and distinguish different frequencies and intensities of sound.

Language development refers to the process by which children acquire the ability to understand and communicate through spoken, written, or signed language. This complex process involves various components including phonology (sound system), semantics (meaning of words and sentences), syntax (sentence structure), and pragmatics (social use of language). Language development begins in infancy with cooing and babbling and continues through early childhood and beyond, with most children developing basic conversational skills by the age of 4-5 years. However, language development can continue into adolescence and even adulthood as individuals learn new languages or acquire more advanced linguistic skills. Factors that can influence language development include genetics, environment, cognition, and social interactions.

The United States Occupational Safety and Health Administration (OSHA) is not a medical term, but rather a term related to occupational health and safety. OSHA is a division of the U.S. Department of Labor that regulates workplace safety and health. It was created by the Occupational Safety and Health Act of 1970 to ensure safe and healthy working conditions for workers by setting and enforcing standards and providing training, outreach, education and assistance. OSHA covers most private sector employers and their workers, in addition to some public sector employers and workers in the 50 states and certain territories and jurisdictions under federal authority.

The vestibular system is a part of the inner ear that contributes to our sense of balance and spatial orientation. It is made up of two main components: the vestibule and the labyrinth.

The vestibule is a bony chamber in the inner ear that contains two important structures called the utricle and saccule. These structures contain hair cells and fluid-filled sacs that help detect changes in head position and movement, allowing us to maintain our balance and orientation in space.

The labyrinth, on the other hand, is a more complex structure that includes the vestibule as well as three semicircular canals. These canals are also filled with fluid and contain hair cells that detect rotational movements of the head. Together, the vestibule and labyrinth work together to provide us with information about our body's position and movement in space.

Overall, the vestibular system plays a crucial role in maintaining our balance, coordinating our movements, and helping us navigate through our environment.

Aging is a complex, progressive and inevitable process of bodily changes over time, characterized by the accumulation of cellular damage and degenerative changes that eventually lead to increased vulnerability to disease and death. It involves various biological, genetic, environmental, and lifestyle factors that contribute to the decline in physical and mental functions. The medical field studies aging through the discipline of gerontology, which aims to understand the underlying mechanisms of aging and develop interventions to promote healthy aging and extend the human healthspan.

Tympanoplasty is a surgical procedure performed to reconstruct or repair the tympanic membrane (eardrum) and/or the small bones of the middle ear (ossicles). The primary goal of this surgery is to restore hearing, but it can also help manage chronic middle ear infections, traumatic eardrum perforations, or cholesteatoma (a skin growth in the middle ear).

During the procedure, a surgeon may use various techniques such as grafting tissue from another part of the body to rebuild the eardrum or using prosthetic materials to reconstruct the ossicles. The choice of technique depends on the extent and location of the damage. Tympanoplasty is typically an outpatient procedure, meaning patients can return home on the same day of the surgery.

Otitis media is an inflammation or infection of the middle ear. It can occur as a result of a cold, respiratory infection, or allergy that causes fluid buildup behind the eardrum. The buildup of fluid can lead to infection and irritation of the middle ear, causing symptoms such as ear pain, hearing loss, and difficulty balancing. There are two types of otitis media: acute otitis media (AOM), which is a short-term infection that can cause fever and severe ear pain, and otitis media with effusion (OME), which is fluid buildup in the middle ear without symptoms of infection. In some cases, otitis media may require medical treatment, including antibiotics or the placement of ear tubes to drain the fluid and relieve pressure on the eardrum.

A newborn infant is a baby who is within the first 28 days of life. This period is also referred to as the neonatal period. Newborns require specialized care and attention due to their immature bodily systems and increased vulnerability to various health issues. They are closely monitored for signs of well-being, growth, and development during this critical time.

Stapes surgery, also known as stapedectomy or stapedotomy, is a surgical procedure performed to correct hearing loss caused by otosclerosis. Otosclerosis is a condition in which the stapes bone in the middle ear becomes fixed and unable to vibrate properly, leading to conductive hearing loss.

During stapes surgery, the surgeon makes an incision behind the ear and creates a small opening in the eardrum. The fixed stapes bone is then removed or modified, and a prosthetic device is inserted in its place to allow sound vibrations to be transmitted to the inner ear. In some cases, a piece of tissue or artificial material may be used to fill the space left by the removed bone.

Stapedectomy involves complete removal of the stapes bone, while stapedotomy involves making a small hole in the stapes bone and inserting a prosthetic device through it. Both procedures are typically performed on an outpatient basis and have a high success rate in restoring hearing. However, as with any surgical procedure, there are risks involved, including infection, permanent hearing loss, and balance problems.

Threshold Limit Values (TLVs) are defined by the American Conference of Governmental Industrial Hygienists (ACGIH) as "airborne concentrations of substances and physical agents to which most workers can be exposed day after day for a normal 8-hour workday and 40-hour workweek, without adverse health effects." TLVs are based on available scientific data and are designed to provide guidance to occupational health professionals in making decisions regarding safe levels of exposure to various workplace hazards.

TLVs are divided into three categories:

1. Time-weighted average (TWA): This is the average airborne concentration of a substance or physical agent to which a worker can be exposed for an 8-hour workday and 40-hour workweek, without experiencing adverse health effects.
2. Short-term exposure limit (STEL): This is the maximum concentration of a substance or physical agent to which a worker can be exposed for a short period of time (usually 15 minutes) without experiencing significant irritation, narcosis, or other acute toxic effects. STELs are intended to protect workers from brief, but potentially hazardous, exposures.
3. Ceiling limit (CL): This is the concentration of a substance or physical agent that should not be exceeded at any time during the workday. Ceiling limits are designed to protect workers from the potential acute effects of high-concentration exposures.

It's important to note that TLVs are guidelines and not regulatory standards, meaning they do not have the force of law. However, many organizations and companies use TLVs as a basis for establishing their own exposure limits and workplace safety policies.

Labyrinth supporting cells are specialized cells that are located in the inner ear and provide structural and functional support to the sensory hair cells within the labyrinth, which is the complex system of tubes and sacs responsible for maintaining balance and hearing. These supporting cells form a crucial part of the architecture of the inner ear and help to maintain the proper functioning of the sensory hair cells by providing mechanical support, contributing to the development and maintenance of the extracellular matrix, and playing a role in the recycling of neurotransmitters. Additionally, labyrinth supporting cells can also transform into new hair cells in certain circumstances, which has implications for potential regenerative therapies aimed at treating hearing loss and balance disorders.

Ear neoplasms refer to abnormal growths or tumors that occur in the ear. These growths can be benign (non-cancerous) or malignant (cancerous) and can affect any part of the ear, including the outer ear, middle ear, inner ear, and the ear canal.

Benign ear neoplasms are typically slow-growing and do not spread to other parts of the body. Examples include exostoses, osteomas, and ceruminous adenomas. These types of growths are usually removed surgically for cosmetic reasons or if they cause discomfort or hearing problems.

Malignant ear neoplasms, on the other hand, can be aggressive and may spread to other parts of the body. Examples include squamous cell carcinoma, basal cell carcinoma, and adenoid cystic carcinoma. These types of tumors often require more extensive treatment, such as surgery, radiation therapy, and chemotherapy.

It is important to note that any new growth or change in the ear should be evaluated by a healthcare professional to determine the nature of the growth and develop an appropriate treatment plan.

Aminoglycosides are a class of antibiotics that are derived from bacteria and are used to treat various types of infections caused by gram-negative and some gram-positive bacteria. These antibiotics work by binding to the 30S subunit of the bacterial ribosome, which inhibits protein synthesis and ultimately leads to bacterial cell death.

Some examples of aminoglycosides include gentamicin, tobramycin, neomycin, and streptomycin. These antibiotics are often used in combination with other antibiotics to treat severe infections, such as sepsis, pneumonia, and urinary tract infections.

Aminoglycosides can have serious side effects, including kidney damage and hearing loss, so they are typically reserved for use in serious infections that cannot be treated with other antibiotics. They are also used topically to treat skin infections and prevent wound infections after surgery.

It's important to note that aminoglycosides should only be used under the supervision of a healthcare professional, as improper use can lead to antibiotic resistance and further health complications.

A missense mutation is a type of point mutation in which a single nucleotide change results in the substitution of a different amino acid in the protein that is encoded by the affected gene. This occurs when the altered codon (a sequence of three nucleotides that corresponds to a specific amino acid) specifies a different amino acid than the original one. The function and/or stability of the resulting protein may be affected, depending on the type and location of the missense mutation. Missense mutations can have various effects, ranging from benign to severe, depending on the importance of the changed amino acid for the protein's structure or function.

Endolymph is a specific type of fluid that is found within the inner ear, more specifically in the membranous labyrinth of the inner ear. This fluid plays a crucial role in maintaining balance and hearing functions. It helps in the stimulation of hair cells present in the inner ear which then transmit signals to the brain, enabling us to hear and maintain our balance. Any disturbance or changes in the composition or flow of endolymph can lead to various vestibular disorders and hearing problems.

The saccule and utricle are components of the vestibular system, which is responsible for maintaining balance and spatial orientation within the inner ear. Here are the medical definitions:

1. Saccule: A small sac-like structure located in the vestibular labyrinth of the inner ear. It is one of the two otolith organs (the other being the utricle) that detect linear acceleration and gravity. The saccule contains hair cells with stereocilia, which are embedded in a gelatinous matrix containing calcium carbonate crystals called otoconia. When the head changes position or moves linearly, the movement of these otoconia stimulates the hair cells, sending signals to the brain about the direction and speed of the motion.

2. Utricle: Another sac-like structure in the vestibular labyrinth, similar to the saccule but slightly larger. The utricle is also an otolith organ that detects linear acceleration and head tilts. It contains hair cells with stereocilia embedded in a gelatinous matrix filled with otoconia. When the head tilts or moves linearly, the movement of the otoconia stimulates the hair cells, providing information about the position and motion of the head to the brain.

In summary, both the saccule and utricle are essential for maintaining balance and spatial orientation by detecting linear acceleration and gravity through the movement of otoconia on their hair cell receptors.

The vestibulocochlear nerve, also known as the auditory-vestibular nerve or cranial nerve VIII, is a paired peripheral nerve that transmits sensory information from the inner ear to the brain. It has two distinct parts: the cochlear part and the vestibular part.

The cochlear part is responsible for hearing and transmits sound signals from the cochlea to the brain. The vestibular part, on the other hand, is responsible for maintaining balance and spatial orientation by transmitting information about head movement and position from the vestibular apparatus (utricle, saccule, and semicircular canals) in the inner ear to the brain.

Together, these two parts of the vestibulocochlear nerve play a crucial role in our ability to hear and maintain balance. Damage to this nerve can result in hearing loss, tinnitus (ringing in the ears), vertigo (dizziness), or balance problems.

The cochlear nucleus is the first relay station in the auditory pathway within the central nervous system. It is a structure located in the lower pons region of the brainstem and receives sensory information from the cochlea, which is the spiral-shaped organ of hearing in the inner ear.

The cochlear nucleus consists of several subdivisions, each with distinct neuronal populations that process different aspects of auditory information. These subdivisions include the anteroventral cochlear nucleus (AVCN), posteroventral cochlear nucleus (PVCN), dorsal cochlear nucleus (DCN), and the granule cell domain.

Neurons in these subdivisions perform various computations on the incoming auditory signals, such as frequency analysis, intensity coding, and sound localization. The output of the cochlear nucleus is then sent via several pathways to higher brain regions for further processing and interpretation, including the inferior colliculus, medial geniculate body, and eventually the auditory cortex.

Damage or dysfunction in the cochlear nucleus can lead to hearing impairments and other auditory processing disorders.

Otolaryngology is a specialized branch of medicine that deals with the diagnosis, management, and treatment of disorders related to the ear, nose, throat (ENT), and head and neck region. It's also known as ENT (Ear, Nose, Throat) specialty. Otolaryngologists are physicians trained in the medical and surgical management of conditions such as hearing and balance disorders, nasal congestion, sinusitis, allergies, sleep apnea, snoring, swallowing difficulties, voice and speech problems, and head and neck tumors.

A Severity of Illness Index is a measurement tool used in healthcare to assess the severity of a patient's condition and the risk of mortality or other adverse outcomes. These indices typically take into account various physiological and clinical variables, such as vital signs, laboratory values, and co-morbidities, to generate a score that reflects the patient's overall illness severity.

Examples of Severity of Illness Indices include the Acute Physiology and Chronic Health Evaluation (APACHE) system, the Simplified Acute Physiology Score (SAPS), and the Mortality Probability Model (MPM). These indices are often used in critical care settings to guide clinical decision-making, inform prognosis, and compare outcomes across different patient populations.

It is important to note that while these indices can provide valuable information about a patient's condition, they should not be used as the sole basis for clinical decision-making. Rather, they should be considered in conjunction with other factors, such as the patient's overall clinical presentation, treatment preferences, and goals of care.

Cerumen is the medical term for earwax. It is a natural substance produced by the body to protect and clean the ears. Cerumen helps to keep the ear canal moist, which prevents dry, itchy ears, and also traps dirt, dust, and other particles that could harm the eardrum. The earwax then gradually moves out of the ear canal and falls out or is removed during activities like showering or washing the face. While some people may need to have their earwax removed if it builds up and causes hearing problems or discomfort, in most cases, cerumen does not need to be cleaned or removed.

Genetic linkage is the phenomenon where two or more genetic loci (locations on a chromosome) tend to be inherited together because they are close to each other on the same chromosome. This occurs during the process of sexual reproduction, where homologous chromosomes pair up and exchange genetic material through a process called crossing over.

The closer two loci are to each other on a chromosome, the lower the probability that they will be separated by a crossover event. As a result, they are more likely to be inherited together and are said to be linked. The degree of linkage between two loci can be measured by their recombination frequency, which is the percentage of meiotic events in which a crossover occurs between them.

Linkage analysis is an important tool in genetic research, as it allows researchers to identify and map genes that are associated with specific traits or diseases. By analyzing patterns of linkage between markers (identifiable DNA sequences) and phenotypes (observable traits), researchers can infer the location of genes that contribute to those traits or diseases on chromosomes.

The tectorial membrane is a specialized structure in the inner ear, more specifically in the cochlea. It is a gelatinous, hair-like structure that is located above and parallel to the organ of Corti, which contains the sensory hair cells responsible for hearing. The tectorial membrane is composed of collagen fibers and a glycoprotein matrix.

The main function of the tectorial membrane is to deflect the stereocilia (hair-like projections) of the inner and outer hair cells as sound waves pass through the cochlea, which in turn triggers nerve impulses that are sent to the brain and interpreted as sound. The tectorial membrane moves in response to sound-induced vibrations of the fluid within the cochlea, causing shearing forces on the stereocilia, leading to the initiation of the hearing process.

Transcription Factor Brn-3C, also known as POU4F3, is a protein involved in the regulation of gene expression. It belongs to the class IV POU domain transcription factor family and plays crucial roles in the development, maintenance, and function of inner ear hair cells, which are essential for hearing. Mutations in the Brn-3C gene have been associated with deafness disorders in humans. The protein works by binding to specific DNA sequences in the promoter regions of target genes and controlling their transcription into messenger RNA (mRNA). This process is critical for various cellular functions, including cell growth, differentiation, and survival.

Suppurative Otitis Media is a type of inner ear infection that involves the accumulation of pus (suppuration) in the middle ear space. It can be caused by a bacterial or viral infection and often results from a previous episode of acute otitis media, where fluid builds up behind the eardrum (tympanic membrane).

Suppurative Otitis Media can lead to complications such as hearing loss, damage to the inner ear structures, and spread of infection to nearby areas like the mastoid process or the brain. Treatment typically involves antibiotics to clear the infection and sometimes surgical intervention to drain the pus and relieve pressure on the eardrum.

"Age factors" refer to the effects, changes, or differences that age can have on various aspects of health, disease, and medical care. These factors can encompass a wide range of issues, including:

1. Physiological changes: As people age, their bodies undergo numerous physical changes that can affect how they respond to medications, illnesses, and medical procedures. For example, older adults may be more sensitive to certain drugs or have weaker immune systems, making them more susceptible to infections.
2. Chronic conditions: Age is a significant risk factor for many chronic diseases, such as heart disease, diabetes, cancer, and arthritis. As a result, age-related medical issues are common and can impact treatment decisions and outcomes.
3. Cognitive decline: Aging can also lead to cognitive changes, including memory loss and decreased decision-making abilities. These changes can affect a person's ability to understand and comply with medical instructions, leading to potential complications in their care.
4. Functional limitations: Older adults may experience physical limitations that impact their mobility, strength, and balance, increasing the risk of falls and other injuries. These limitations can also make it more challenging for them to perform daily activities, such as bathing, dressing, or cooking.
5. Social determinants: Age-related factors, such as social isolation, poverty, and lack of access to transportation, can impact a person's ability to obtain necessary medical care and affect their overall health outcomes.

Understanding age factors is critical for healthcare providers to deliver high-quality, patient-centered care that addresses the unique needs and challenges of older adults. By taking these factors into account, healthcare providers can develop personalized treatment plans that consider a person's age, physical condition, cognitive abilities, and social circumstances.

Prevalence, in medical terms, refers to the total number of people in a given population who have a particular disease or condition at a specific point in time, or over a specified period. It is typically expressed as a percentage or a ratio of the number of cases to the size of the population. Prevalence differs from incidence, which measures the number of new cases that develop during a certain period.

The ear canal, also known as the external auditory canal, is the tubular passage that extends from the outer ear (pinna) to the eardrum (tympanic membrane). It is lined with skin and tiny hairs, and is responsible for conducting sound waves from the outside environment to the middle and inner ear. The ear canal is typically about 2.5 cm long in adults and has a self-cleaning mechanism that helps to keep it free of debris and wax.

The endolymphatic sac is a small, fluid-filled structure that is part of the inner ear. It is located near the vestibular aqueduct and is responsible for maintaining the balance of fluids in the inner ear. The endolymphatic sac also plays a role in the resorption of endolymph, which is the fluid that fills the membranous labyrinth of the inner ear. Disorders of the endolymphatic sac can lead to conditions such as Meniere's disease, which is characterized by vertigo, hearing loss, and tinnitus.

Pitch discrimination, in the context of audiology and neuroscience, refers to the ability to perceive and identify the difference in pitch between two or more sounds. It is the measure of how accurately an individual can distinguish between different frequencies or tones. This ability is crucial for various aspects of hearing, such as understanding speech, appreciating music, and localizing sound sources.

Pitch discrimination is typically measured using psychoacoustic tests, where a listener is presented with two sequential tones and asked to determine whether the second tone is higher or lower in pitch than the first one. The smallest detectable difference between the frequencies of these two tones is referred to as the "just noticeable difference" (JND) or the "difference limen." This value can be used to quantify an individual's pitch discrimination abilities and may vary depending on factors such as frequency, intensity, and age.

Deficits in pitch discrimination can have significant consequences for various aspects of daily life, including communication difficulties and reduced enjoyment of music. These deficits can result from damage to the auditory system due to factors like noise exposure, aging, or certain medical conditions, such as hearing loss or neurological disorders.

The spiral ligament of the cochlea is a fibrous structure located in the inner ear, more specifically in the cochlea. It is part of the membranous labyrinth and helps to maintain the shape and tension of the cochlear duct, which is essential for hearing.

The spiral ligament is attached to the bony wall of the cochlea and runs along the entire length of the cochlear duct, spiraling around it in a snail-like fashion. It consists of an outer, highly vascularized fibrous layer (the fibrous cap) and an inner, more cellular layer (the avascular zone).

The spiral ligament plays a crucial role in sound transmission and perception by helping to maintain the mechanical properties of the cochlear duct. The tension on the basilar membrane, where the sensory hair cells are located, is regulated by the spiral ligament's stiffness and elasticity. This tension affects the vibration amplitude and frequency selectivity of the basilar membrane, which in turn influences how we perceive different sounds and pitches.

Damage to the spiral ligament can result in hearing loss or impairment due to disrupted sound transmission and perception.

Speech is the vocalized form of communication using sounds and words to express thoughts, ideas, and feelings. It involves the articulation of sounds through the movement of muscles in the mouth, tongue, and throat, which are controlled by nerves. Speech also requires respiratory support, phonation (vocal cord vibration), and prosody (rhythm, stress, and intonation).

Speech is a complex process that develops over time in children, typically beginning with cooing and babbling sounds in infancy and progressing to the use of words and sentences by around 18-24 months. Speech disorders can affect any aspect of this process, including articulation, fluency, voice, and language.

In a medical context, speech is often evaluated and treated by speech-language pathologists who specialize in diagnosing and managing communication disorders.

KCNQ potassium channels, also known as Kv7 channels, are a type of voltage-gated potassium channel that play important roles in regulating electrical excitability in various tissues, including the heart and nervous system. These channels are composed of several subunits, typically formed by combinations of KCNQ1 to KCNQ5 proteins, which form a pore through which potassium ions can flow in response to changes in membrane voltage.

KCNQ channels are characterized by their slow activation and deactivation kinetics, which contribute to their role in setting the resting membrane potential and modulating the frequency of action potentials in neurons. In the heart, KCNQ channels help to regulate the duration of the cardiac action potential and are therefore important for maintaining normal heart rhythm.

Mutations in KCNQ channel genes have been associated with a variety of inherited disorders, including long QT syndrome, a condition characterized by abnormalities in the electrical repolarization of the heart that can lead to life-threatening arrhythmias. Other diseases associated with KCNQ channel dysfunction include epilepsy, migraine, and various forms of hearing loss.

The endolymphatic duct is a narrow canal in the inner ear that is part of the membranous labyrinth. It connects the utricle and saccule (two sensory structures in the vestibular system responsible for detecting changes in head position and movement) to the endolymphatic sac (a dilated portion of the duct that helps regulate the volume and pressure of endolymph, a fluid found within the membranous labyrinth).

The endolymphatic duct plays a crucial role in maintaining the balance and homeostasis of the inner ear by allowing the absorption and circulation of endolymph. Disorders or abnormalities in this region can lead to various vestibular and hearing dysfunctions, such as Meniere's disease, endolymphatic hydrops, and other inner ear disorders.

Lipreading, also known as speechreading, is not a medical term per se, but it is a communication strategy often used by individuals with hearing loss. It involves paying close attention to the movements of the lips, facial expressions, and body language of the person who is speaking to help understand spoken words.

While lipreading can be helpful, it should be noted that it is not an entirely accurate way to comprehend speech, as many sounds look similar on the lips, and factors such as lighting and the speaker's articulation can affect its effectiveness. Therefore, lipreading is often used in conjunction with other communication strategies, such as hearing aids, cochlear implants, or American Sign Language (ASL).

Gerbillinae is a subfamily of rodents that includes gerbils, jirds, and sand rats. These small mammals are primarily found in arid regions of Africa and Asia. They are characterized by their long hind legs, which they use for hopping, and their long, thin tails. Some species have adapted to desert environments by developing specialized kidneys that allow them to survive on minimal water intake.

Animal disease models are specialized animals, typically rodents such as mice or rats, that have been genetically engineered or exposed to certain conditions to develop symptoms and physiological changes similar to those seen in human diseases. These models are used in medical research to study the pathophysiology of diseases, identify potential therapeutic targets, test drug efficacy and safety, and understand disease mechanisms.

The genetic modifications can include knockout or knock-in mutations, transgenic expression of specific genes, or RNA interference techniques. The animals may also be exposed to environmental factors such as chemicals, radiation, or infectious agents to induce the disease state.

Examples of animal disease models include:

1. Mouse models of cancer: Genetically engineered mice that develop various types of tumors, allowing researchers to study cancer initiation, progression, and metastasis.
2. Alzheimer's disease models: Transgenic mice expressing mutant human genes associated with Alzheimer's disease, which exhibit amyloid plaque formation and cognitive decline.
3. Diabetes models: Obese and diabetic mouse strains like the NOD (non-obese diabetic) or db/db mice, used to study the development of type 1 and type 2 diabetes, respectively.
4. Cardiovascular disease models: Atherosclerosis-prone mice, such as ApoE-deficient or LDLR-deficient mice, that develop plaque buildup in their arteries when fed a high-fat diet.
5. Inflammatory bowel disease models: Mice with genetic mutations affecting intestinal barrier function and immune response, such as IL-10 knockout or SAMP1/YitFc mice, which develop colitis.

Animal disease models are essential tools in preclinical research, but it is important to recognize their limitations. Differences between species can affect the translatability of results from animal studies to human patients. Therefore, researchers must carefully consider the choice of model and interpret findings cautiously when applying them to human diseases.

A phenotype is the physical or biochemical expression of an organism's genes, or the observable traits and characteristics resulting from the interaction of its genetic constitution (genotype) with environmental factors. These characteristics can include appearance, development, behavior, and resistance to disease, among others. Phenotypes can vary widely, even among individuals with identical genotypes, due to differences in environmental influences, gene expression, and genetic interactions.

Bacterial meningitis is a serious infection that causes the membranes (meninges) surrounding the brain and spinal cord to become inflamed. It's caused by various types of bacteria, such as Streptococcus pneumoniae, Neisseria meningitidis, and Haemophilus influenzae type b.

The infection can develop quickly, over a few hours or days, and is considered a medical emergency. Symptoms may include sudden high fever, severe headache, stiff neck, nausea, vomiting, confusion, and sensitivity to light. In some cases, a rash may also be present.

Bacterial meningitis can lead to serious complications such as brain damage, hearing loss, learning disabilities, and even death if not treated promptly with appropriate antibiotics and supportive care. It is important to seek immediate medical attention if you suspect bacterial meningitis. Vaccines are available to prevent certain types of bacterial meningitis.

I believe there may be some confusion in your question. "Industry" is a general term that refers to a specific branch of economic activity, or a particular way of producing goods or services. It is not a medical term with a defined meaning within the field of medicine.

However, if you are referring to the term "industrious," which can be used to describe someone who is diligent and hard-working, it could be applied in a medical context to describe a patient's level of engagement and effort in their own care. For example, a patient who is conscientious about taking their medications as prescribed, following through with recommended treatments, and making necessary lifestyle changes to manage their condition might be described as "industrious" by their healthcare provider.

Speech production measurement is the quantitative analysis and assessment of various parameters and characteristics of spoken language, such as speech rate, intensity, duration, pitch, and articulation. These measurements can be used to diagnose and monitor speech disorders, evaluate the effectiveness of treatment, and conduct research in fields such as linguistics, psychology, and communication disorders. Speech production measurement tools may include specialized software, hardware, and techniques for recording, analyzing, and visualizing speech data.

Alström Syndrome is a rare inherited genetic disorder characterized by the combination of several features, including:

1. Progressive visual impairment due to retinal degeneration (retinitis pigmentosa), which typically begins in childhood and can lead to blindness.
2. Hearing loss, which can also begin in childhood and progress over time.
3. Obesity, which often develops in early childhood and can lead to type 2 diabetes, high blood pressure, and other cardiovascular complications.
4. Dilated cardiomyopathy, a condition in which the heart muscle becomes weakened and enlarged, leading to heart failure.
5. Kidney disease, which can range from mild to severe and may require dialysis or transplantation.
6. Neurological symptoms, such as developmental delays, cognitive impairment, and movement disorders.
7. Hormonal imbalances, including problems with growth hormone, thyroid function, and sexual development.

Alström Syndrome is caused by mutations in the ALMS1 gene, which provides instructions for making a protein that is believed to play a role in maintaining the structure and function of various organelles within cells. The disorder is inherited in an autosomal recessive manner, meaning that an individual must inherit two copies of the mutated gene (one from each parent) in order to develop the condition.

There is no cure for Alström Syndrome, but early diagnosis and management of its various symptoms can help improve quality of life and prolong survival. Treatment typically involves a multidisciplinary approach, with input from specialists such as ophthalmologists, audiologists, cardiologists, nephrologists, endocrinologists, and neurologists.

Language development disorders, also known as language impairments or communication disorders, refer to a group of conditions that affect an individual's ability to understand and/or use spoken or written language in a typical manner. These disorders can manifest as difficulties with grammar, vocabulary, sentence structure, word finding, following directions, and/or conversational skills.

Language development disorders can be receptive (difficulty understanding language), expressive (difficulty using language to communicate), or mixed (a combination of both). They can occur in isolation or as part of a broader neurodevelopmental disorder, such as autism spectrum disorder or intellectual disability.

The causes of language development disorders are varied and may include genetic factors, environmental influences, neurological conditions, hearing loss, or other medical conditions. It is important to note that language development disorders are not the result of low intelligence or lack of motivation; rather, they reflect a specific impairment in the brain's language processing systems.

Early identification and intervention for language development disorders can significantly improve outcomes and help individuals develop effective communication skills. Treatment typically involves speech-language therapy, which may be provided individually or in a group setting, and may involve strategies such as modeling correct language use, practicing targeted language skills, and using visual aids to support comprehension.

Vestibular hair cells are specialized sensory receptor cells located in the vestibular system of the inner ear. They play a crucial role in detecting and mediating our sense of balance and spatial orientation by converting mechanical stimuli, such as head movements and gravity, into electrical signals that are sent to the brain.

The hair cells are shaped like a tuft of hair, with stereocilia projecting from their tops. These stereocilia are arranged in rows of graded height, and they are embedded in a gel-like structure within the vestibular organ. When the head moves or changes position, the movement causes deflection of the stereocilia, which opens ion channels at their tips and triggers nerve impulses that are sent to the brain via the vestibular nerve.

There are two types of vestibular hair cells: type I and type II. Type I hair cells have a large, spherical shape and are more sensitive to changes in head position, while type II hair cells are more cylindrical in shape and respond to both linear and angular acceleration. Together, these hair cells help us maintain our balance, coordinate our movements, and keep our eyes focused during head movements.

A homozygote is an individual who has inherited the same allele (version of a gene) from both parents and therefore possesses two identical copies of that allele at a specific genetic locus. This can result in either having two dominant alleles (homozygous dominant) or two recessive alleles (homozygous recessive). In contrast, a heterozygote has inherited different alleles from each parent for a particular gene.

The term "homozygote" is used in genetics to describe the genetic makeup of an individual at a specific locus on their chromosomes. Homozygosity can play a significant role in determining an individual's phenotype (observable traits), as having two identical alleles can strengthen the expression of certain characteristics compared to having just one dominant and one recessive allele.

Auditory perceptual disorders, also known as auditory processing disorders (APD), refer to a group of hearing-related problems in which the ears are able to hear sounds normally, but the brain has difficulty interpreting or making sense of those sounds. This means that individuals with APD have difficulty recognizing and discriminating speech sounds, especially in noisy environments. They may also have trouble identifying where sounds are coming from, distinguishing between similar sounds, and understanding spoken language when it is rapid or complex.

APD can lead to difficulties in academic performance, communication, and social interactions. It is important to note that APD is not a hearing loss, but rather a problem with how the brain processes auditory information. Diagnosis of APD typically involves a series of tests administered by an audiologist, and treatment may include specialized therapy and/or assistive listening devices.

An ossicular prosthesis is a medical device used to replace one or more of the small bones (ossicles) in the middle ear that are involved in hearing. These bones, known as the malleus, incus, and stapes, form a chain responsible for transmitting sound vibrations from the eardrum to the inner ear.

An ossicular prosthesis is typically made of biocompatible materials such as ceramic, plastic, or metal. The prosthesis is designed to bypass damaged or missing ossicles and reestablish the connection between the eardrum and the inner ear, thereby improving hearing function. Ossicular prostheses are often used in surgeries aimed at reconstructing the middle ear, such as tympanoplasty or stapedectomy, to treat various types of conductive hearing loss.

Mitochondrial DNA (mtDNA) is the genetic material present in the mitochondria, which are specialized structures within cells that generate energy. Unlike nuclear DNA, which is present in the cell nucleus and inherited from both parents, mtDNA is inherited solely from the mother.

MtDNA is a circular molecule that contains 37 genes, including 13 genes that encode for proteins involved in oxidative phosphorylation, a process that generates energy in the form of ATP. The remaining genes encode for rRNAs and tRNAs, which are necessary for protein synthesis within the mitochondria.

Mutations in mtDNA can lead to a variety of genetic disorders, including mitochondrial diseases, which can affect any organ system in the body. These mutations can also be used in forensic science to identify individuals and establish biological relationships.

A questionnaire in the medical context is a standardized, systematic, and structured tool used to gather information from individuals regarding their symptoms, medical history, lifestyle, or other health-related factors. It typically consists of a series of written questions that can be either self-administered or administered by an interviewer. Questionnaires are widely used in various areas of healthcare, including clinical research, epidemiological studies, patient care, and health services evaluation to collect data that can inform diagnosis, treatment planning, and population health management. They provide a consistent and organized method for obtaining information from large groups or individual patients, helping to ensure accurate and comprehensive data collection while minimizing bias and variability in the information gathered.

Neurofibromatosis 2 (NF2) is a genetic disorder characterized by the development of non-cancerous tumors in the nervous system, particularly on the nerves related to hearing and balance. It's also known as central neurofibromatosis or bilateral acoustic neuroma syndrome.

The primary feature of NF2 is the growth of schwannomas, which are tumors that develop from the cells surrounding nerve fibers. These typically grow on the vestibular nerve, leading to hearing loss, ringing in the ears (tinnitus), and balance problems. Bilateral acoustic neuromas (schwannomas affecting both vestibular nerves) are a hallmark of this condition.

Other common features include:

1. Meningiomas: These are tumors that grow in the meninges, the protective layers surrounding the brain and spinal cord.
2. Ependymomas: These are tumors that develop from the ependymal cells lining the ventricles (fluid-filled spaces) in the brain or the spinal cord canal.
3. Neurofibromas: Unlike in Neurofibromatosis type 1, these are less common and typically don't become cancerous.
4. Skin changes: While not as prevalent as in NF1, some people with NF2 may have skin freckles, café-au-lait spots, or skin tumors.
5. Eye problems: Some individuals may experience cataracts, retinal abnormalities, or optic nerve tumors (optic gliomas).
6. Other potential symptoms: Headaches, facial weakness or numbness, and difficulty swallowing or speaking.

NF2 is an autosomal dominant disorder, meaning that a person has a 50% chance of inheriting the condition if one of their parents has it. However, about half of all NF2 cases result from spontaneous genetic mutations with no family history of the disorder.

I'm sorry for any confusion, but "vocabulary" is a term related to language and communication, rather than medicine or healthcare. It refers to the words and phrases that a person knows and uses in their communication. If you have any questions related to medical terminology or health-related topics, I would be happy to help with those!

The semicircular canals are part of the vestibular system in the inner ear that contributes to the sense of balance and spatial orientation. They are composed of three fluid-filled tubes, each located in a different plane (anterior, posterior, and horizontal) and arranged at approximately right angles to each other. The semicircular canals detect rotational movements of the head, enabling us to maintain our equilibrium during movement.

When the head moves, the fluid within the semicircular canals moves in response to that motion. At the end of each canal is a structure called the ampulla, which contains hair cells with hair-like projections (stereocilia) embedded in a gelatinous substance. As the fluid moves, it bends the stereocilia, stimulating the hair cells and sending signals to the brain via the vestibular nerve. The brain then interprets these signals to determine the direction and speed of head movement, allowing us to maintain our balance and orientation in space.

Susac syndrome, also known as retinocochleocerebral vasculopathy, is a rare autoimmune disorder characterized by the inflammation and damage to small blood vessels in the brain, retina, and inner ear. It primarily affects young adults, particularly women, and can lead to various neurological, auditory, and visual symptoms.

The medical definition of Susac syndrome includes:

1. Encephalopathy (brain dysfunction) - This is characterized by headaches, cognitive impairment, behavioral changes, seizures, or psychiatric symptoms due to inflammation in the brain.
2. Branch retinal artery occlusions (BRAO) - These are blockages of small blood vessels in the retina, leading to visual disturbances such as blurry vision, scotomas (blind spots), or even permanent vision loss.
3. Sensorineural hearing loss - This is caused by damage to the inner ear structures responsible for hearing, resulting in difficulties with hearing, tinnitus (ringing in the ears), or vertigo (dizziness).

The triad of these symptoms is necessary for a definitive diagnosis of Susac syndrome. However, not all patients may present with all three components simultaneously. The presence of any two features should raise suspicion for this condition, and further diagnostic workup is required to confirm the diagnosis. Early recognition and treatment are crucial to prevent long-term complications and improve outcomes in patients with Susac syndrome.

A cross-sectional study is a type of observational research design that examines the relationship between variables at one point in time. It provides a snapshot or a "cross-section" of the population at a particular moment, allowing researchers to estimate the prevalence of a disease or condition and identify potential risk factors or associations.

In a cross-sectional study, data is collected from a sample of participants at a single time point, and the variables of interest are measured simultaneously. This design can be used to investigate the association between exposure and outcome, but it cannot establish causality because it does not follow changes over time.

Cross-sectional studies can be conducted using various data collection methods, such as surveys, interviews, or medical examinations. They are often used in epidemiology to estimate the prevalence of a disease or condition in a population and to identify potential risk factors that may contribute to its development. However, because cross-sectional studies only provide a snapshot of the population at one point in time, they cannot account for changes over time or determine whether exposure preceded the outcome.

Therefore, while cross-sectional studies can be useful for generating hypotheses and identifying potential associations between variables, further research using other study designs, such as cohort or case-control studies, is necessary to establish causality and confirm any findings.

In the field of medicine, "time factors" refer to the duration of symptoms or time elapsed since the onset of a medical condition, which can have significant implications for diagnosis and treatment. Understanding time factors is crucial in determining the progression of a disease, evaluating the effectiveness of treatments, and making critical decisions regarding patient care.

For example, in stroke management, "time is brain," meaning that rapid intervention within a specific time frame (usually within 4.5 hours) is essential to administering tissue plasminogen activator (tPA), a clot-busting drug that can minimize brain damage and improve patient outcomes. Similarly, in trauma care, the "golden hour" concept emphasizes the importance of providing definitive care within the first 60 minutes after injury to increase survival rates and reduce morbidity.

Time factors also play a role in monitoring the progression of chronic conditions like diabetes or heart disease, where regular follow-ups and assessments help determine appropriate treatment adjustments and prevent complications. In infectious diseases, time factors are crucial for initiating antibiotic therapy and identifying potential outbreaks to control their spread.

Overall, "time factors" encompass the significance of recognizing and acting promptly in various medical scenarios to optimize patient outcomes and provide effective care.

The petrous bone is a part of the temporal bone, one of the 22 bones in the human skull. It is a thick and irregularly shaped bone located at the base of the skull and forms part of the ear and the cranial cavity. The petrous bone contains the cochlea, vestibule, and semicircular canals of the inner ear, which are responsible for hearing and balance. It also helps protect the brain from injury by forming part of the bony structure surrounding the brain.

The term "petrous" comes from the Latin word "petrosus," meaning "stony" or "rock-like," which describes the hard and dense nature of this bone. The petrous bone is one of the densest bones in the human body, making it highly resistant to fractures and other forms of damage.

In medical terminology, the term "petrous" may also be used to describe any structure that resembles a rock or is hard and dense, such as the petrous apex, which refers to the portion of the petrous bone that points towards the sphenoid bone.

The exome is the part of the genome that contains all the protein-coding regions. It represents less than 2% of the human genome but accounts for about 85% of disease-causing mutations. Exome sequencing, therefore, is a cost-effective and efficient method to identify genetic variants associated with various diseases, including cancer, neurological disorders, and inherited genetic conditions.

A heterozygote is an individual who has inherited two different alleles (versions) of a particular gene, one from each parent. This means that the individual's genotype for that gene contains both a dominant and a recessive allele. The dominant allele will be expressed phenotypically (outwardly visible), while the recessive allele may or may not have any effect on the individual's observable traits, depending on the specific gene and its function. Heterozygotes are often represented as 'Aa', where 'A' is the dominant allele and 'a' is the recessive allele.

"CBA" is an abbreviation for a specific strain of inbred mice that were developed at the Cancer Research Institute in London. The "Inbred CBA" mice are genetically identical individuals within the same strain, due to many generations of brother-sister matings. This results in a homozygous population, making them valuable tools for research because they reduce variability and increase reproducibility in experimental outcomes.

The CBA strain is known for its susceptibility to certain diseases, such as autoimmune disorders and cancer, which makes it a popular choice for researchers studying those conditions. Additionally, the CBA strain has been widely used in studies related to transplantation immunology, infectious diseases, and genetic research.

It's important to note that while "Inbred CBA" mice are a well-established and useful tool in biomedical research, they represent only one of many inbred strains available for scientific investigation. Each strain has its own unique characteristics and advantages, depending on the specific research question being asked.

The mastoid is a term used in anatomy and refers to the bony prominence located at the base of the skull, posterior to the ear. More specifically, it's part of the temporal bone, one of the bones that forms the side and base of the skull. The mastoid process provides attachment for various muscles involved in chewing and moving the head.

In a medical context, "mastoid" can also refer to conditions or procedures related to this area. For example, mastoiditis is an infection of the mastoid process, while a mastoidectomy is a surgical procedure that involves removing part or all of the mastoid process.

Child language refers to the development of linguistic abilities in children, including both receptive and expressive communication. This includes the acquisition of various components of language such as phonology (sound system), morphology (word structure), syntax (sentence structure), semantics (meaning), and pragmatics (social use of language).

Child language development typically follows a predictable sequence, beginning with cooing and babbling in infancy, followed by the use of single words and simple phrases in early childhood. Over time, children acquire more complex linguistic structures and expand their vocabulary to communicate more effectively. However, individual differences in the rate and pace of language development are common.

Clinical professionals such as speech-language pathologists may assess and diagnose children with language disorders or delays in order to provide appropriate interventions and support for typical language development.

Articulation disorders are speech sound disorders that involve difficulties producing sounds correctly and forming clear, understandable speech. These disorders can affect the way sounds are produced, the order in which they're pronounced, or both. Articulation disorders can be developmental, occurring as a child learns to speak, or acquired, resulting from injury, illness, or disease.

People with articulation disorders may have trouble pronouncing specific sounds (e.g., lisping), omitting sounds, substituting one sound for another, or distorting sounds. These issues can make it difficult for others to understand their speech and can lead to frustration, social difficulties, and communication challenges in daily life.

Speech-language pathologists typically diagnose and treat articulation disorders using various techniques, including auditory discrimination exercises, phonetic placement activities, and oral-motor exercises to improve muscle strength and control. Early intervention is essential for optimal treatment outcomes and to minimize the potential impact on a child's academic, social, and emotional development.

Chromosome mapping, also known as physical mapping, is the process of determining the location and order of specific genes or genetic markers on a chromosome. This is typically done by using various laboratory techniques to identify landmarks along the chromosome, such as restriction enzyme cutting sites or patterns of DNA sequence repeats. The resulting map provides important information about the organization and structure of the genome, and can be used for a variety of purposes, including identifying the location of genes associated with genetic diseases, studying evolutionary relationships between organisms, and developing genetic markers for use in breeding or forensic applications.

Branchio-Oto-Rnal (BOR) syndrome is a genetic disorder that affects the development of structures in the neck and head, as well as the kidneys and ears. The name "branchio-oto-renal" comes from the Greek words "branchia," meaning gill, "ot", meaning ear, and "renal," meaning kidney, reflecting the main areas affected by this syndrome.

BOR syndrome is characterized by a combination of the following features:

1. Branchial arch anomalies: These are abnormalities in the structures that develop from the branchial arches, which are embryonic structures that give rise to various parts of the head and neck. In BOR syndrome, these anomalies may include pits, tags, or cysts on the side of the neck.
2. Hearing loss: Most people with BOR syndrome have hearing loss, which can range from mild to severe. The hearing loss is often conductive, meaning it results from problems with the outer or middle ear, but it can also be sensorineural, meaning it affects the inner ear or nerve pathways that transmit sound to the brain.
3. Renal anomalies: About 25% of people with BOR syndrome have kidney abnormalities, which can include structural defects, such as horseshoe kidney, or functional problems, such as renal insufficiency.

BOR syndrome is caused by mutations in the EYA1 gene, which is involved in the development and function of the ears, kidneys, and other structures in the body. The condition is inherited in an autosomal dominant manner, meaning that a person has a 50% chance of inheriting the disorder if one of their parents has it.

Treatment for BOR syndrome typically involves addressing the specific symptoms and complications that arise. For example, hearing loss may be managed with hearing aids or cochlear implants, while kidney problems may require surgery or other interventions. Regular monitoring by a healthcare team is also important to detect and manage any potential complications.

Cryopyrin-Associated Periodic Syndromes (CAPS) are a group of rare, hereditary autoinflammatory disorders caused by mutations in the NLRP3 gene, which encodes the cryopyrin protein. The mutation leads to overactivation of the inflammasome, an intracellular complex that regulates the activation of inflammatory cytokines, resulting in uncontrolled inflammation.

CAPS include three clinical subtypes:

1. Familial Cold Autoinflammatory Syndrome (FCAS): This is the mildest form of CAPS and typically presents in infancy or early childhood with recurrent episodes of fever, urticaria-like rash, and joint pain triggered by cold exposure.
2. Muckle-Wells Syndrome (MWS): This subtype is characterized by more severe symptoms than FCAS, including recurrent fever, urticaria-like rash, joint pain, and progressive hearing loss. Patients with MWS are also at risk for developing amyloidosis, a serious complication that can lead to kidney failure.
3. Neonatal-Onset Multisystem Inflammatory Disease (NOMID): Also known as chronic infantile neurological cutaneous and articular syndrome (CINCA), this is the most severe form of CAPS. It presents at birth or in early infancy with fever, urticaria-like rash, joint inflammation, and central nervous system involvement, including chronic meningitis, developmental delay, and hearing loss.

Treatment for CAPS typically involves targeted therapies that block the overactive inflammasome, such as IL-1 inhibitors. Early diagnosis and treatment can help prevent long-term complications and improve quality of life for patients with these disorders.

Medical Definition:

"Risk factors" are any attribute, characteristic or exposure of an individual that increases the likelihood of developing a disease or injury. They can be divided into modifiable and non-modifiable risk factors. Modifiable risk factors are those that can be changed through lifestyle choices or medical treatment, while non-modifiable risk factors are inherent traits such as age, gender, or genetic predisposition. Examples of modifiable risk factors include smoking, alcohol consumption, physical inactivity, and unhealthy diet, while non-modifiable risk factors include age, sex, and family history. It is important to note that having a risk factor does not guarantee that a person will develop the disease, but rather indicates an increased susceptibility.

Central auditory diseases refer to a group of disorders that affect the processing of auditory information in the central nervous system, specifically in the brainstem and cortex. These disorders can result from various causes, such as head injuries, infections, tumors, or degenerative conditions. They can cause difficulties with understanding speech, locating the source of sounds, and perceiving complex or rapidly changing auditory stimuli.

Central auditory processing disorder (CAPD) is a common type of central auditory disease. It is a hearing problem that affects about 5% of school-aged children. Kids with CAPD can't process what they hear in the same way other kids do because their ears and brain don't fully coordinate. Something interferes with the way the brain recognizes and interprets sounds, especially speech.

CAPD is not a hearing loss or an intelligence problem. Children with CAPD have normal structural hearing and can often hear sounds that are presented to them individually. However, they may struggle to understand speech in noisy environments, follow complex directions, or distinguish similar sounds from one another.

Central auditory diseases are typically diagnosed through a series of tests that assess different aspects of auditory processing, such as speech recognition in noise, temporal processing, and binaural integration. Treatment for these disorders may include auditory training, assistive listening devices, and environmental modifications to help compensate for the processing difficulties.

A LOD (Logarithm of Odds) score is not a medical term per se, but rather a statistical concept that is used in genetic research and linkage analysis to determine the likelihood of a gene or genetic marker being linked to a particular disease or trait. The LOD score compares the odds of observing the pattern of inheritance of a genetic marker in a family if the marker is linked to the disease, versus the odds if the marker is not linked. A LOD score of 3 or higher is generally considered evidence for linkage, while a score of -2 or lower is considered evidence against linkage.

'Abnormalities, Multiple' is a broad term that refers to the presence of two or more structural or functional anomalies in an individual. These abnormalities can be present at birth (congenital) or can develop later in life (acquired). They can affect various organs and systems of the body and can vary greatly in severity and impact on a person's health and well-being.

Multiple abnormalities can occur due to genetic factors, environmental influences, or a combination of both. Chromosomal abnormalities, gene mutations, exposure to teratogens (substances that cause birth defects), and maternal infections during pregnancy are some of the common causes of multiple congenital abnormalities.

Examples of multiple congenital abnormalities include Down syndrome, Turner syndrome, and VATER/VACTERL association. Acquired multiple abnormalities can result from conditions such as trauma, infection, degenerative diseases, or cancer.

The medical evaluation and management of individuals with multiple abnormalities depend on the specific abnormalities present and their impact on the individual's health and functioning. A multidisciplinary team of healthcare professionals is often involved in the care of these individuals to address their complex needs.

Genetic testing is a type of medical test that identifies changes in chromosomes, genes, or proteins. The results of a genetic test can confirm or rule out a suspected genetic condition or help determine a person's chance of developing or passing on a genetic disorder. Genetic tests are performed on a sample of blood, hair, skin, amniotic fluid (the fluid that surrounds a fetus during pregnancy), or other tissue. For example, a physician may recommend genetic testing to help diagnose a genetic condition, confirm the presence of a gene mutation known to increase the risk of developing certain cancers, or determine the chance for a couple to have a child with a genetic disorder.

There are several types of genetic tests, including:

* Diagnostic testing: This type of test is used to identify or confirm a suspected genetic condition in an individual. It may be performed before birth (prenatal testing) or at any time during a person's life.
* Predictive testing: This type of test is used to determine the likelihood that a person will develop a genetic disorder. It is typically offered to individuals who have a family history of a genetic condition but do not show any symptoms themselves.
* Carrier testing: This type of test is used to determine whether a person carries a gene mutation for a genetic disorder. It is often offered to couples who are planning to have children and have a family history of a genetic condition or belong to a population that has an increased risk of certain genetic disorders.
* Preimplantation genetic testing: This type of test is used in conjunction with in vitro fertilization (IVF) to identify genetic changes in embryos before they are implanted in the uterus. It can help couples who have a family history of a genetic disorder or who are at risk of having a child with a genetic condition to conceive a child who is free of the genetic change in question.
* Pharmacogenetic testing: This type of test is used to determine how an individual's genes may affect their response to certain medications. It can help healthcare providers choose the most effective medication and dosage for a patient, reducing the risk of adverse drug reactions.

It is important to note that genetic testing should be performed under the guidance of a qualified healthcare professional who can interpret the results and provide appropriate counseling and support.

The cerebellopontine angle (CPA) is a narrow space located at the junction of the brainstem and the cerebellum, where the pons and cerebellum meet. This region is filled with several important nerves, blood vessels, and membranous coverings called meninges. The CPA is a common site for various neurological disorders because it contains critical structures such as:

1. Cerebellum: A part of the brain responsible for coordinating muscle movements, maintaining balance, and fine-tuning motor skills.
2. Pons: A portion of the brainstem that plays a role in several vital functions, including facial movements, taste sensation, sleep regulation, and respiration.
3. Cranial nerves: The CPA is home to the following cranial nerves:
* Vestibulocochlear nerve (CN VIII): This nerve has two components - cochlear and vestibular. The cochlear part is responsible for hearing, while the vestibular part contributes to balance and eye movement.
* Facial nerve (CN VII): This nerve controls facial expressions, taste sensation in the anterior two-thirds of the tongue, salivary gland function, and lacrimation (tear production).
4. Blood vessels: The CPA contains critical blood vessels like the anterior inferior cerebellar artery (AICA), which supplies blood to various parts of the brainstem, cerebellum, and cranial nerves.
5. Meninges: These are protective membranes surrounding the brain and spinal cord. In the CPA, the meninges include the dura mater, arachnoid mater, and pia mater.

Disorders that can affect the structures in the cerebellopontine angle include acoustic neuromas (vestibular schwannomas), meningiomas, epidermoids, and arteriovenous malformations. These conditions may cause symptoms such as hearing loss, tinnitus (ringing in the ears), vertigo (dizziness), facial weakness or numbness, difficulty swallowing, and imbalance.

Pneumococcal meningitis is a specific type of bacterial meningitis, which is an inflammation of the membranes covering the brain and spinal cord (meninges). It is caused by the bacterium Streptococcus pneumoniae, also known as pneumococcus. This bacterium is commonly found in the upper respiratory tract and middle ear fluid of healthy individuals. However, under certain circumstances, it can invade the bloodstream and reach the meninges, leading to meningitis.

Pneumococcal meningitis is a serious and potentially life-threatening condition that requires immediate medical attention. Symptoms may include sudden onset of fever, severe headache, stiff neck, nausea, vomiting, confusion, and sensitivity to light (photophobia). In some cases, it can also lead to complications such as hearing loss, brain damage, or even death if not treated promptly and effectively.

Treatment typically involves the use of antibiotics that are effective against pneumococcus, such as ceftriaxone or vancomycin. In some cases, corticosteroids may also be used to reduce inflammation and prevent complications. Prevention measures include vaccination with the pneumococcal conjugate vaccine (PCV13) or the pneumococcal polysaccharide vaccine (PPSV23), which can help protect against pneumococcal infections, including meningitis.

The oval window ( fenestra vestibuli ) is a small opening in the inner ear, specifically in the bony labyrinth of the temporal bone. It connects the middle ear to the vestibular system of the inner ear, more precisely to the vestibule. The oval window is covered by the base of the stapes, one of the three smallest bones in the human body, also known as the stirrup. This arrangement allows for the transmission of vibratory energy from the tympanic membrane (eardrum) to the inner ear, which is essential for hearing.

Cholesteatoma, middle ear is a medical condition characterized by the abnormal growth of skin cells (keratinizing squamous epithelium) within the middle ear space. This skin cells accumulation forms a pearly, white, or gray mass that can erode and destroy surrounding structures such as the ossicles (the tiny bones in the middle ear), the mastoid process (a bony prominence behind the ear), and even the inner ear or brain.

Cholesteatomas can be congenital (present at birth) or acquired (develop later in life). Acquired cholesteatomas are more common and usually result from repeated middle ear infections that cause a retraction pocket of the eardrum, which then traps skin cells leading to their abnormal growth. Symptoms of cholesteatoma may include hearing loss, ear drainage, ear pain, vertigo, or facial weakness. Treatment typically involves surgical removal of the cholesteatoma and restoration of any damaged structures.

A case-control study is an observational research design used to identify risk factors or causes of a disease or health outcome. In this type of study, individuals with the disease or condition (cases) are compared with similar individuals who do not have the disease or condition (controls). The exposure history or other characteristics of interest are then compared between the two groups to determine if there is an association between the exposure and the disease.

Case-control studies are often used when it is not feasible or ethical to conduct a randomized controlled trial, as they can provide valuable insights into potential causes of diseases or health outcomes in a relatively short period of time and at a lower cost than other study designs. However, because case-control studies rely on retrospective data collection, they are subject to biases such as recall bias and selection bias, which can affect the validity of the results. Therefore, it is important to carefully design and conduct case-control studies to minimize these potential sources of bias.

Vestibular Evoked Myogenic Potentials (VEMPs) are short-latency electromyographic responses recorded from the sternocleidomastoid or other neck muscles in response to intense, high-frequency bone conducted vibration or air-conducted sound. They reflect the activation of the vestibular afferents that innervate the otolithic organs (saccule and utricle) in response to linear acceleration and head tilt. VEMPs are used in clinical settings to assess the function of the vestibular system, particularly the sacculocollic reflex pathway, and can help diagnose various vestibular disorders such as superior canal dehiscence syndrome, vestibular neuritis, and Meniere's disease.

Anion transport proteins are specialized membrane transport proteins that facilitate the movement of negatively charged ions, known as anions, across biological membranes. These proteins play a crucial role in maintaining ionic balance and regulating various physiological processes within the body.

There are several types of anion transport proteins, including:

1. Cl-/HCO3- exchangers (also known as anion exchangers or band 3 proteins): These transporters facilitate the exchange of chloride (Cl-) and bicarbonate (HCO3-) ions across the membrane. They are widely expressed in various tissues, including the red blood cells, gastrointestinal tract, and kidneys, where they help regulate pH, fluid balance, and electrolyte homeostasis.
2. Sulfate permeases: These transporters facilitate the movement of sulfate ions (SO42-) across membranes. They are primarily found in the epithelial cells of the kidneys, intestines, and choroid plexus, where they play a role in sulfur metabolism and absorption.
3. Cl- channels: These proteins form ion channels that allow chloride ions to pass through the membrane. They are involved in various physiological processes, such as neuronal excitability, transepithelial fluid transport, and cell volume regulation.
4. Cation-chloride cotransporters: These transporters move both cations (positively charged ions) and chloride anions together across the membrane. They are involved in regulating neuronal excitability, cell volume, and ionic balance in various tissues.

Dysfunction of anion transport proteins has been implicated in several diseases, such as cystic fibrosis (due to mutations in the CFTR Cl- channel), distal renal tubular acidosis (due to defects in Cl-/HCO3- exchangers), and some forms of epilepsy (due to abnormalities in cation-chloride cotransporters).

The inferior colliculi are a pair of rounded eminences located in the midbrain, specifically in the tectum of the mesencephalon. They play a crucial role in auditory processing and integration. The inferior colliculi receive inputs from various sources, including the cochlear nuclei, superior olivary complex, and cortical areas. They then send their outputs to the medial geniculate body, which is a part of the thalamus that relays auditory information to the auditory cortex.

In summary, the inferior colliculi are important structures in the auditory pathway that help process and integrate auditory information before it reaches the cerebral cortex for further analysis and perception.

Retrospective studies, also known as retrospective research or looking back studies, are a type of observational study that examines data from the past to draw conclusions about possible causal relationships between risk factors and outcomes. In these studies, researchers analyze existing records, medical charts, or previously collected data to test a hypothesis or answer a specific research question.

Retrospective studies can be useful for generating hypotheses and identifying trends, but they have limitations compared to prospective studies, which follow participants forward in time from exposure to outcome. Retrospective studies are subject to biases such as recall bias, selection bias, and information bias, which can affect the validity of the results. Therefore, retrospective studies should be interpreted with caution and used primarily to generate hypotheses for further testing in prospective studies.

I apologize for any confusion, but "Military Personnel" is not a medical term. It refers to individuals who serve in the military forces of a country, including the Army, Navy, Air Force, Marine Corps, and Coast Guard. Medical terms typically refer to specific conditions, diagnoses, treatments, or anatomical features related to healthcare. If you have any questions about medical terminology or concepts, I would be happy to help clarify!

The basilar membrane is a key structure within the inner ear that plays a crucial role in hearing. It is a narrow, flexible strip of tissue located inside the cochlea, which is the spiral-shaped organ responsible for converting sound waves into neural signals that can be interpreted by the brain.

The basilar membrane runs along the length of the cochlea's duct and is attached to the rigid bony structures at both ends. It varies in width and stiffness along its length, with the widest and most flexible portion located near the entrance of the cochlea and the narrowest and stiffest portion located near the apex.

When sound waves enter the inner ear, they cause vibrations in the fluid-filled cochlear duct. These vibrations are transmitted to the basilar membrane, causing it to flex up and down. The specific pattern of flexion along the length of the basilar membrane depends on the frequency of the sound wave. Higher frequency sounds cause maximum flexion near the base of the cochlea, while lower frequency sounds cause maximum flexion near the apex.

As the basilar membrane flexes, it causes the attached hair cells to bend. This bending stimulates the hair cells to release neurotransmitters, which then activate the auditory nerve fibers. The pattern of neural activity in the auditory nerve encodes the frequency and amplitude of the sound wave, allowing the brain to interpret the sound.

Overall, the basilar membrane is a critical component of the hearing process, enabling us to detect and discriminate different sounds based on their frequency and amplitude.

Hereditary nephritis is a genetic disorder that causes recurring inflammation of the kidneys' glomeruli, which are the tiny blood vessel clusters that filter waste from the blood. This condition is also known as hereditary glomerulonephritis.

The inherited form of nephritis is caused by mutations in specific genes, leading to abnormalities in the proteins responsible for maintaining the structural integrity and proper functioning of the glomeruli. As a result, affected individuals typically experience hematuria (blood in urine), proteinuria (protein in urine), hypertension (high blood pressure), and progressive kidney dysfunction that can ultimately lead to end-stage renal disease (ESRD).

There are different types of hereditary nephritis, such as Alport syndrome and thin basement membrane nephropathy. These conditions have distinct genetic causes, clinical presentations, and inheritance patterns. Early diagnosis and appropriate management can help slow the progression of kidney damage and improve long-term outcomes for affected individuals.

Hereditary Sensory and Autonomic Neuropathies (HSANs) are a group of inherited disorders that affect the sensory and autonomic nerves. These nerves are responsible for transmitting information about senses such as touch, pain, temperature, and vibration to the brain, as well as controlling automatic functions like blood pressure, heart rate, and digestion.

HSANs are caused by genetic mutations that result in damage to the peripheral nerves. There are several types of HSANs, each with its own specific symptoms and patterns of inheritance. Some common features include:

* Loss of sensation in the hands and feet
* Pain insensitivity
* Absent or reduced reflexes
* Autonomic dysfunction, such as abnormal sweating, blood pressure regulation, and digestive problems

The severity and progression of HSANs can vary widely depending on the specific type and individual factors. Treatment is generally focused on managing symptoms and preventing complications, such as injuries from lack of pain sensation or falls due to balance problems. Early diagnosis and intervention are important for optimizing outcomes.

Analysis of Variance (ANOVA) is a statistical technique used to compare the means of two or more groups and determine whether there are any significant differences between them. It is a way to analyze the variance in a dataset to determine whether the variability between groups is greater than the variability within groups, which can indicate that the groups are significantly different from one another.

ANOVA is based on the concept of partitioning the total variance in a dataset into two components: variance due to differences between group means (also known as "between-group variance") and variance due to differences within each group (also known as "within-group variance"). By comparing these two sources of variance, ANOVA can help researchers determine whether any observed differences between groups are statistically significant, or whether they could have occurred by chance.

ANOVA is a widely used technique in many areas of research, including biology, psychology, engineering, and business. It is often used to compare the means of two or more experimental groups, such as a treatment group and a control group, to determine whether the treatment had a significant effect. ANOVA can also be used to compare the means of different populations or subgroups within a population, to identify any differences that may exist between them.

... distinguishing conductive hearing loss from other kinds of hearing loss. A conductive hearing loss is characterized by a ... If a conductive hearing loss occurs in conjunction with a sensorineural hearing loss, it is referred to as a mixed hearing loss ... The hearing loss is usually worse in lower frequencies. Congenital conductive hearing loss is identified through newborn ... Conventional air conduction hearing aids can also be used. Hearing loss Sensorineural hearing loss Hill-Feltham, Penny R.; ...
Schweitzer, V. G.; Kemink, J. L.; Graham, M. D. (1984). "Conductive hearing loss, middle ear ossicular anomalies, malformed ... Thick earlobes Conductive hearing loss Congenital auditory ossicle anomalies Micrognathia Escher et al. described a family with ... is a rare genetic disorder which is characterized by ear and jaw abnormalities associated with progressive hearing loss. Two ... "Thickened earlobes-conductive deafness syndrome (Concept Id: C1851896) - MedGen - NCBI". www.ncbi.nlm.nih.gov. Retrieved 2022- ...
Post-operative sensory and conductive hearing loss. Post-operative meningitis, temporal lobe oedema, epidural hematoma. ... For patient with total hearing loss, translabyrinthine approach was made with a skin incision from mastoid apex to the scalp ... There may also be demyelination (loss of the nerve's myelin sheath) and degeneration of the nerve in the affected area but it ... This middle cranial fossae exposure is used to expose I.A.C. and labyrinthine segment of the facial nerve when hearing ...
This deformity results in conductive hearing loss, deafness. Ear development begins in about the third week of human embryonic ... "Hopkins Hearing". Baha- implantable hearing device. Johns Hopkins Medicine. Retrieved 25 November 2012. Microtia-Anotia at ... reconstructive surgery may not help with the child's hearing and in this case a Bone Anchored Hearing Aid would be best. BAHA ... will likely restore the hearing. The BAHA may be surgically implanted onto the skull which would allow for some hearing repair ...
Eric Lupo J, Koka K, Thornton JL, Tollin DJ (February 2011). "The effects of experimentally induced conductive hearing loss on ... Webster DB, Webster M (1979). "Effects of neonatal conductive hearing loss on brain stem auditory nuclei". Ann. Otol. Rhinol. ... laminaris dendritic length following monaural conductive hearing loss". J. Comp. Neurol. 220 (2): 199-205. doi:10.1002/cne. ... "Binaural processing after corrected congenital unilateral conductive hearing loss". Hear. Res. 74 (1-2): 99-114. doi:10.1016/ ...
... can lead to low-frequency conductive hearing loss, autophony, and vertigo. Syndromic hearing loss can be either conductive or ... may cause permanent hearing loss. Noise-induced hearing loss (NIHL) typically manifests as elevated hearing thresholds (i.e. ... Causes of hearing loss include ageing, genetics, perinatal problems, loud sounds, and diseases. For some kinds of hearing loss ... Combined with noise, these ototoxic chemicals have an additive effect on a person's hearing loss. Hearing loss due to chemicals ...
Many individuals have hearing loss, either conductive (in which pressure behind the eardrum causes fluid from the lining of the ... conductive and/or neurosensitive loss of hearing and clouded corneas. Intelligence is normal unless hydrocephalus develops and ... followed by eventual loss of language skills and loss of some or all hearing. Some children may never learn to speak. In the ... This is followed by progressive mental decline and loss of physical skills. Language may be limited due to hearing loss and an ...
This can result in conductive hearing loss and finger deformities. Hirshoren, N; Gross, M; Banin, E; Sosna, J; Bargal, R; Raas- ... Toriello, Helga V.; Smith, Shelley D. (2013). Hereditary Hearing Loss and Its Syndromes. Oxford University Press. p. 405. ISBN ...
If there is conductive hearing loss, it is likely to be louder in the affected ear; if there is sensorineural hearing loss, it ... If they cannot, there is conductive hearing loss in that ear. Additionally, the tuning fork is placed on the forehead. The ... This test helps the audiologist determine whether the hearing loss is conductive (caused by problems in the outer or middle ear ... A complete hearing evaluation involves several other tests as well. In order to determine what kind of hearing loss is present ...
Conductive hearing loss may occur due to otitis media.[citation needed] Chronic constipation is a frequent complaint in the 18p ... To ensure early diagnosis and treatment, it is suggested that people with 18p- undergo routine screenings for hearing and ...
Rupture or perforation of the eardrum can lead to conductive hearing loss. Collapse or retraction of the eardrum can cause ... "Autoincudotomy as an uncommon etiology of conductive hearing loss: Case report and review of literature". Radiology Case ... conductive hearing loss or cholesteatoma. The tympanic membrane is oriented obliquely in the anteroposterior, mediolateral, and ... Patients with tympanic membrane rupture may experience bleeding, tinnitus, hearing loss, or disequilibrium (vertigo). However, ...
There are three main types of hearing loss, conductive hearing loss, sensorineural hearing loss. Combinations of conductive and ... Mixed hearing loss Mixed hearing loss is a combination of conductive and sensorineural hearing loss. Chronic ear infection (a ... Conductive hearing loss Conductive hearing loss is present when the sound is not reaching the inner ear, the cochlea. This can ... The hearing loss of the individual is the average of the hearing loss values over the different frequencies. Hearing loss can ...
... there is a conductive hearing loss). In sensorineural hearing loss the ability to sense the tuning fork by both bone and air ... Thus, one can quickly screen for the presence of conductive hearing loss. A Rinne test should always be accompanied by a Weber ... This pattern is the same to what is found in people with normal hearing, but patients with sensorineural hearing loss will ... test to also detect sensorineural hearing loss and thus confirm the nature of hearing loss. The Rinne test was named after ...
A perforated eardrum leads to conductive hearing loss, which is usually temporary. Other symptoms may include tinnitus, ear ... Hearing is usually recovered fully, but chronic infection over a long period may lead to permanent hearing loss. Those with ...
PTA can be used to differentiate between conductive hearing loss, sensorineural hearing loss and mixed hearing loss. A hearing ... Conductive hearing loss, hearing loss caused primarily by conditions in the middle ear Cortical deafness, another kind of nerve ... It can help identify conductive hearing loss due to disease of the middle ear or eardrum from other kinds of hearing loss ... Bone conduction thresholds can differentiate sensorineural hearing loss from conductive hearing loss. Other tests, such as oto- ...
An AMEI is also indicated for patients with conductive or mixed hearing loss with bone conduction thresholds from 45 dB in the ... PMEIs are the usual first-line surgical treatment for conductive hearing loss, due to their lack of external components and ... AMEIs are intended for patients with mild-to-severe sensorineural hearing loss, as well as those with conductive or mixed ... They help people with conductive, sensorineural or mixed hearing loss to hear. Middle ear implants work by improving the ...
Otologic involvement can result in sensorineural hearing loss, conductive hearing loss and microtia. Congenital heart defects ... Hearing loss with craniofacial syndromes, Syndromes affecting the eye, Syndromes affecting joints, Disorders causing seizures, ... Tympanostomy tube, hearing aids, cochlear implants are used as recommended by otorhinolaryngology and audiology. Cardiology and ... 2022-09-30). "A novel de novo TET3 loss-of-function variant in a Turkish boy presenting with neurodevelopmental delay and ...
... of the stapes bone of the middle ear can restore hearing in cases of conductive hearing loss Surgical and implantable hearing ... a direct bone conduction hearing aid is often the best solution. If the conductive part of the hearing loss is more than 30-35 ... but any hearing loss incurred may be permanent. Management of hearing loss in older age especially is increasingly gaining ... and configuration of the hearing loss. Most hearing loss results from age and noise, is progressive, and irreversible. There ...
... otitis media and conductive hearing loss (Perterson-Fazone et al., 2001). Conductive hearing loss is frequently seen in this ... and the type of loss is generally a conductive hearing loss. Patients with Treacher Collins syndrome exhibit hearing losses ... Patients with a sensorineural hearing loss have also been reported but are less likely to occur. A conductive hearing loss ... have other minor anomalies and there may be a presence of a conductive hearing loss or a mixed hearing loss (Perterson-Falszone ...
... the degree of hearing loss and ossicular destruction is even greater. Periods of conductive hearing loss from otitis media may ... All three types of otitis media may be associated with hearing loss. If children with hearing loss due to OME do not learn sign ... An effusion can cause conductive hearing loss if it interferes with the transmission of vibrations of middle ear bones to the ... Australian Aboriginals experience a high level of conductive hearing loss largely due to the massive incidence of middle ear ...
Indications of stapedectomy: Conductive hearing loss (due to fixation of stapes). Air bone gap of at least 30 dB. Presence of ... total sensorineural hearing loss 0.6%, partial sensorineural hearing loss 0.3%, and vertigo 0.3%. In this series, there was no ... If the stapes footplate is fixed in position, rather than being normally mobile, the result is a conductive hearing loss. There ... Laser stapedotomy is a well-established surgical technique for treating conductive hearing loss due to otosclerosis. The ...
... frequently have conductive and/or sensorineural hearing loss. The degree of hearing loss may vary from mild to severe. ... hearing, and vision problems.[citation needed] Distal 18q- was first described in 1964. Originally, it was called "De Grouchy ...
Some cause hearing loss by restricting sound-induced vibrations of the eardrum. Permanent conductive hearing loss can be caused ... Various strategies may be used to manage tympanic membrane retraction, with the aims of preventing or relieving hearing loss ... Hearing may improve as a result, however it can be a painful maneuver. The benefits are typically only temporary. Middle ear ... by erosion of the ossicles (hearing bones). Discharge from the ear often indicates that the retraction pocket has developed ...
It is primarily suited for people who have conductive hearing losses, unilateral hearing loss, single-sided deafness and people ... Examples of the first include age-related hearing loss and hearing loss due to noise exposure. A patient born without external ... "Bilateral bone-anchored hearing aids for bilateral permanent conductive hearing loss: a systematic review". Otolaryngology-Head ... A person with unilateral hearing loss may have functional difficulty hearing even when the other ear is normal, particularly in ...
Hearing loss may be unilateral or bilateral. Unilateral hearing loss is most often associated with conductive causes, trauma, ... Hearing loss may be gradual or sudden. Hearing loss may be very mild, resulting in minor difficulties with conversation, or as ... The speed with which hearing loss occurs may give clues as to the cause. If hearing loss is sudden, it may be from trauma or a ... of severely visually impaired older adults additionally suffered from significant hearing loss. Vision and hearing loss both ...
The hearing loss is generally bilateral with a conductive loss of about 50-70 dB. Even in cases with normal auricles and open ... As a result of these abnormalities, a majority of the individuals with TCS have conductive hearing loss. Most affected people ... Marres, HA (2002). Hearing loss in the Treacher-Collins syndrome. pp. 209-15. doi:10.1159/000066811. ISBN 978-3-8055-7449-5. ... Hearing loss in Treacher Collins syndrome is caused by deformed structures in the outer and middle ear. ...
"Autoincudotomy as an uncommon etiology of conductive hearing loss: Case report and review of literature". Radiology Case ... The absence of the auditory ossicles would constitute a moderate-to-severe hearing loss. The term "ossicle" literally means " ... This reduces hearing and may be treated surgically using a passive middle ear implant.[further explanation needed] There is ...
There are three main types of hearing loss: conductive hearing loss, sensorineural hearing loss, and mixed hearing loss. An ... conductive hearing loss, sensorineural hearing loss, and mixed hearing loss. About half of hearing loss globally is preventable ... Hearing aid applications are one of the options for hearing loss management. For people with bilateral hearing loss, it is not ... While everyone loses hearing with age, the amount and type of hearing loss is variable. Noise-induced hearing loss (NIHL), also ...
... or surgery of the hearing bones, and mastoidectomy. Otology also includes surgical treatment of conductive hearing loss, such ... Otology is a branch of medicine which studies normal and pathological anatomy and physiology of the ear (hearing and vestibular ... Audiology - Branch of science that studies hearing, balance, and related disorders Ear Research Foundation - Research institute ... which can lead to hearing and balance disorders. Neurotologic surgery generally refers to surgery of the inner ear or surgery ...
"Autoincudotomy as an uncommon etiology of conductive hearing loss: Case report and review of literature". Radiology Case ... If a patient presents to a doctor with ear discharge and hearing loss, the doctor should consider cholesteatoma until the ... Preservation of hearing is secondary to this primary aim. If the disease can be removed easily so that there is no increased ... To prevent this, these ossicles must be removed, which may diminish the patient's hearing. The formation of a mastoid cavity by ...
... distinguishing conductive hearing loss from other kinds of hearing loss. A conductive hearing loss is characterized by a ... If a conductive hearing loss occurs in conjunction with a sensorineural hearing loss, it is referred to as a mixed hearing loss ... The hearing loss is usually worse in lower frequencies. Congenital conductive hearing loss is identified through newborn ... Conventional air conduction hearing aids can also be used. Hearing loss Sensorineural hearing loss Hill-Feltham, Penny R.; ...
Mixed hearing loss is a combination of conductive hearing loss and inner ear hearing loss (sensorineural hearing loss). ... Understanding Conductive Hearing Loss. What is conductive hearing loss? How will my child be able to hear if they have microtia ... Common Hearing Loss Questions. Do I have hearing loss?. What are the types of hearing loss?. How does a cochlear implant work? ... Conductive hearing loss can have many causes. In newborns, congenital conductive hearing loss is generally caused by issues ...
Psychology definition for Conductive Hearing Loss in normal everyday language, edited by psychologists, professors and leading ... Conductive Hearing Loss. Conductive Hearing Loss occurs when there is a physical problem conducting sound waves through the ear ... hearing loss which refers to problems with the nerve connections between the eardrum and brain. ...
... conductive hearing loss is the most easily treated. However, its still important to understand how and why it occurs. ... Hearing Health: Conductive Hearing Loss Among the four types of hearing loss, conductive hearing loss is the most easily ... What is Conductive Hearing Loss?. Conductive hearing loss is a form of hearing loss that occurs when sound is unable to reach ... Causes of Conductive Hearing Loss. As mentioned before, conductive hearing loss can occur in two areas. Common afflictions of ...
... including comprehensive hearing evaluations, allergy testing and treatment and balance testing. ...
Conductive Hearing Loss is one of the main types of Hearing Loss, learn about the symptoms & what treatments are available for ... Amplification to manage conductive hearing loss. Hearing aids are extremely important in the management of conductive hearing ... A conductive hearing loss can be seen on an audiogram (hearing chart) when there is a gap between the air conduction and bone ... If you have a conductive hearing loss, we can talk to you more about how hearing aids can benefit you. Do not hesitate to book ...
Breaking Barriers: Transforming Conductive Hearing Loss Treatment Through Groundbreaking Research October 28, 2023 No Comments ... Navigating the Sounds of Life: A Comprehensive Guide for Seniors Living with Conductive Hearing Loss October 29, 2023 No ... Echoes of Empathy: Understanding Conductive Hearing Loss Through Culture and Media" October 24, 2023 No Comments ... Unraveling the Mysteries of Conductive Hearing Loss: Exploring Complementary and Holistic Therapie October 27, 2023 No Comments ...
... conductive; Conductive Hearing Loss. On-line free medical diagnosis assistant. Ranked list of possible diseases from either ... Hearing Loss, Conductive (Conductive Hearing Loss). hearing loss due to interference with the mechanical reception or ... Ranked list of diseases related to "Hearing Loss, Conductive"Drugs, active principles and "Hearing Loss, Conductive"Medicinal ...
However, medical professionals learn little about hearing impairment, about how to advise parents of children who are deaf or ... Hearing loss is more prevalent than diabetes mellitus, myelomeningocele, all pediatric cancers, and numerous other medical ... hard of hearing, or about the special considerations needed in the care of children... ... Conductive hearing loss. Manage conductive hearling loss (CHL) due to otitis media or its sequelae with a course of appropriate ...
Do you know the difference between conductive and sensorineural hearing loss? We explain each type, the causes, and the ... What is Mixed Hearing Loss?. Mixed hearing loss is a combination of both sensorineural hearing loss and conductive hearing loss ... Hearing Loss Treatment Options. Treatment for Conductive Hearing Loss. This type of hearing loss is usually less serious than ... How is Conductive Hearing Loss Diagnosed?. Conductive hearing loss is diagnosed through a physical examination and a hearing ...
Learn about the causes and different treatment options of conductive hearing loss. ... Conductive hearing loss occurs when there is a problem in the inner ear. ... What is Conductive Hearing Loss?. A conductive hearing loss occurs when there is a problem with the one or more of the parts of ... Unlike a sensorineural hearing loss a conductive hearing loss occurs because the sound entering the ear is reduced or dampened ...
The use of any hearing aid may not fully restore normal hearing and does not prevent future hearing loss. Testing is to ... which may include selling and fitting hearing aids. Hearing instruments may not meet the needs of all hearing-impaired ... The purpose of this hearing assessment and/or demonstration is for hearing wellness to determine if the client(s) may benefit ... Ready to start your journey to better hearing? Let our hearing care professionals find the right solution for you. ...
Ear infections and fluid accumulation in the ear are the two causes of conductive hearing loss. It is temporary obstruction or ... If the conductive hearing loss combines with sensorineural hearing loss, then it is termed as "Mixed Hearing loss." ... Why Children Are More Prone To Conductive Hearing Loss?. Conductive hearing loss is common in the child because of their ... Unilateral or Bilateral Hearing Loss:. When one ear lost its hearing ability, it is termed as "Unilateral" hearing loss while ...
Best ENT Doctor in DelhiENT Specialist DelhiHearing LossHearing Loss Treatment ... Conductive Hearing Loss Treatment in Delhi. by Adventis Clinic April 16, 2020, 7:50 pm. ... Conductive hearing loss treatment for outer ear infection, perforation, middle ear infection in Delhi Know the conditions and ... Best Tips On Raising A Child With Hearing Loss. by Sphear - Speech and Hearing Clinic January 31, 2021, 1:51 pm. ...
Learn about the causes and different treatment options of conductive hearing loss. ... Conductive hearing loss occurs when there is a problem in the inner ear. ... What Is Conductive Hearing Loss?. A conductive hearing loss occurs when there is a problem with one or more of the parts of the ... Unlike a sensorineural hearing loss, a conductive hearing loss occurs because the sound entering the ear is reduced or dampened ...
Surgery for conductive hearing loss aims to correct the underlying problem that is causing the hearing loss. ... Minimize the risk of further hearing loss - Conductive hearing loss can often progress to sensorineural hearing loss if left ... Who is conductive hearing loss surgery suitable for?. Conductive hearing loss surgery is suitable for individuals who have been ... Conductive hearing loss surgery is suitable for individuals who have been diagnosed with conductive hearing loss and are ...
Learn about the causes and different treatment options of conductive hearing loss. ... Conductive hearing loss occurs when there is a problem in the inner ear. ... Conductive Hearing Loss. Skip to content .hero:before { background: ;}. What Is Conductive Hearing Loss?. A conductive hearing ... Unlike a sensorineural hearing loss, a conductive hearing loss occurs because the sound entering the ear is reduced or dampened ...
Learn about the causes and different treatment options of conductive hearing loss. ... Conductive hearing loss occurs when there is a problem in the inner ear. ... What is Conductive Hearing Loss?. A conductive hearing loss occurs when there is a problem with the one or more of the parts of ... Unlike a sensorineural hearing loss a conductive hearing loss occurs because the sound entering the ear is reduced or dampened ...
Learn about the causes and different treatment options of conductive hearing loss. ... Conductive hearing loss occurs when there is a problem in the inner ear. ... What Is Conductive Hearing Loss?. A conductive hearing loss occurs when there is a problem with one or more of the parts of the ... Unlike a sensorineural hearing loss, a conductive hearing loss occurs because the sound entering the ear is reduced or dampened ...
... mixed hearing loss, and single-sided deafness, three types of hearing loss that can benefit from bone conduction hearing ... TYPES OF HEARING LOSS. The Alpha 2 MPO ePlusâ„¢ device is suitable for patients with conductive hearing loss, mixed hearing loss ... If you have been diagnosed with conductive hearing loss, mixed hearing loss, or single-sided sensorineural hearing loss, bone ... and single-sided sensorineural hearing loss. Read more about each type of hearing loss and consult your physician to find out ...
IL Provides Information On Topics Such As Conductive Hearing Loss, Visit Our Conductive Hearing Loss Page To Learn More. Call ... What Causes Conductive Hearing Loss?. Conductive hearing loss happens when the natural movement of sound through the external ... What Are the Symptoms of Conductive Hearing Loss?. Symptoms of conductive hearing loss can vary depending on the exact cause ... Many types of hearing loss can also be treated with the use of conventional hearing or an implantable hearing device. Again, ...
Learn about the 3 types of hearing loss including sensorineural, conductive and mixed hearing loss. ... Hearing health: Mixed hearing loss. Because mixed hearing loss is a combination of sensorineural and conductive hearing loss, ... Mixed hearing loss. Mixed hearing loss is a combination of conductive and sensorineural hearing loss. This means that there is ... Hearing health: Sensorineural hearing loss. As the most common type of hearing loss, sensorineural hearing loss is well- ...
Visit Our Conductive Hearing Loss Page To Learn More! ... Conductive Hearing Loss Conductive Hearing Loss. Hearing loss ... What Causes Conductive Hearing Loss?. Conductive hearing loss happens when the natural movement of sound through the external ... What Are the Symptoms of Conductive Hearing Loss?. Symptoms of conductive hearing loss can vary depending on the exact cause ... Many types of hearing loss can also be treated with the use of conventional hearing or an implantable hearing device. Again, ...
What are the different types of hearing l ... Conductive hearing loss is the most common type of hearing loss ... Mixed hearing loss. This is a combination of sensorineural and conductive hearing loss. It involves damage to the outer, middle ... Three types of hearing loss are sensorineural, conductive, and mixed (sensorineural and conductive). These types of hearing ... Conductive hearing loss. A problem in the outer or middle ear where sound waves are not sent to the inner ear correctly. ...
Cochlear implants can be a difficult choice for many people with severe to profound hearing loss. Choosing cochlear implant ... Why Are My Hearing Aids Not Enough?. Cochlear implants can be an option for people who have severe hearing loss from cochlea ... Conductive Hearing Loss Causes and Treatment. by Leah Lefler. 10. *. Disabilities & the Disabled ... Loss of the hearing you have left, ringing in your ears also called tinnitus or leaks in the fluid around the brain. Meningitis ...
2018 Type and Severity Summary of Identified Cases of Hearing Loss (By Ear): ASHA Classification ... Conductive. Slight. 7. 9. 0. 0. 3. 6. 0. 0. Mild. 58. 58. 0. 0. 27. 21. 0. 2. ... Impacts of COVID-19 on Early Hearing Detection and Intervention. *Infants with Suspected Hearing Loss May Not Receive Timely ... 2018 Type and Severity Summary of Identified Cases of Hearing Loss (By Ear):ASHA Classification. BILATERAL (by Ear). UNILATERAL ...
Learn more about hearing loss and the many different types of hearing aids to choose from. ... Poor hearing can impact your world and relationships in significant ways. ... Damage to any of these areas can result in hearing loss.. Conductive Hearing Loss. With conductive hearing loss, sounds cant ... Hearing aids may be helpful.. Mixed Hearing Loss. In some cases, conductive and sensorineural hearing loss occurs at the same ...
... hearing) system is not working in the usual way. ... A hearing loss can happen when any part of the ear or auditory ... There are four types of hearing loss:. *Conductive Hearing Loss. Hearing loss caused by something that stops sounds from ... Mixed Hearing Loss. Hearing loss that includes both a conductive and a sensorineural hearing loss. ... The degree of hearing loss can range from mild to profound:. *Mild Hearing Loss. A person with a mild hearing loss may hear ...
Learn about the two types of hearing loss. ... Hearing loss can be caused by trauma, diseases, long term ... Conductive Hearing Loss (American Academy of Otolaryngology--Head and Neck Surgery) * Earbuds (Nemours Foundation) Also in ... Hearing and Balance Symptoms and Conditions (American Academy of Audiology) * Noise-Induced Hearing Loss (National Institute on ... Treatment or surgery can often reverse this kind of hearing loss.. Untreated, hearing problems can get worse. If you have ...
Conductive hearing loss. (n.d.). https://www.asha.org/public/hearing/Conductive-Hearing-Loss/. ... and injuries can cause hearing loss.. There are two general types. Conductive hearing lossoccurs when sound cannot travel ... This results in what doctors call "mixed hearing loss.". A doctor may also refer to hearing loss as bilateral, affecting both ... Presbycusis: This refers to natural hearing loss due to aging, and it is the most common cause of sensorineural hearing loss. ...
  • When exploring the topic of deafness, you might come across information for varying forms of hearing loss. (signia.net)
  • Treatment can cure some of the hearing loss and prevent future hearing damage, hopefully avoiding permanent deafness. (cornerstoneaudiology.com)
  • For total deafness in one ear, sound projected to the cochlea provides clarity and direction of sound better than hearing aids. (medtronic.com)
  • Severe hearing loss or total deafness in only one ear, an inability or difficulty to understand speech on the deaf ear or lack of ability to directional sound. (medtronic.com)
  • Deafness can keep you from hearing sound at all. (medlineplus.gov)
  • As the rate of acquired hearing loss secondary to environmental causes decreases and improvements in the diagnosis of abnormalities occur, the significance of genetic factors that lead to deafness increases. (nature.com)
  • Estimates of the different types of genetic deafness exceed 400, and to date, 60 genes for syndromic and nonsyndromic hearing loss have been identified. (nature.com)
  • and a syndrome that includes preauricular sinuses, conductive deafness, commissural lip pits, and external ear abnormalities. (medscape.com)
  • 90 dB): With profound hearing loss (deafness), speech and language deteriorate. (medscape.com)
  • Depending upon the severity and nature of the conductive loss, this type of hearing impairment can often be treated with surgical intervention or pharmaceuticals to partially or, in some cases, fully restore hearing acuity to within normal range. (wikipedia.org)
  • Conductive hearing loss refers to a type of hearing impairment that occurs when there is a problem in the outer or middle ear that prevents sound from being properly conducted to the inner ear. (auditorey.com)
  • When that accident causes injuries leading to hearing impairment, severe hearing loss, or vision loss, your life can change forever. (reichandbinstock.com)
  • Some hearing and vision injuries can improve with medical treatment, but more severe injuries can lead to lasting hearing and vision impairment. (reichandbinstock.com)
  • The aim of this review is to provide a comprehensive framework underlying the causes of hearing impairment and to detail the clinical management for patients with hereditary hearing loss. (nature.com)
  • "Hearing impairment" and "hearing loss" are often used interchangeably by health care professionals when referring to hearing below threshold levels for normal hearing determined by audiometry. (nature.com)
  • All participants were subjected to Weber in sub-Saharan Africa, the most prevalent and Rinne tests for assessment of hearing causes of hearing impairment are chronic disabilities. (who.int)
  • As a result, an average hearing threshold (lowest audible sound level) at separate frequencies of 1,000 Hz, 2,000 Hz, and 3,000 Hz is used widely to define material impairment caused by noise (10,11). (cdc.gov)
  • These estimates generally agree with NIOSH survey findings, which indicate that one-fourth of persons 55 years of age or older who have been exposed over their working lifetime to an average of about 90 dBA have developed a material hearing impairment caused by occupational noise exposure (10,12). (cdc.gov)
  • An estimated $835 million will be paid in workers' compensation claims for occupational hearing impairment for the 10-year period 1978-1987 (13). (cdc.gov)
  • Introduction: Middle ear effusion (MEE) is a common childhood disorder that causes hearing impairment due to the presence of fluid in the middle ear which reduces the middle ear's ability to conduct sound. (bvsalud.org)
  • Hearing impairment without appropriate intervention among young children can delay the acquisition of speech and language skills that, in turn, can result in learning and other problems at school age (1). (cdc.gov)
  • Interventions to reduce the occurrence of communication disabilities associated with hearing impairment are most successful if affected children are identified early, ideally during the first few months of life (1). (cdc.gov)
  • Technologies are now available to accurately and routinely screen all newborns for hearing impairment before hospital discharge (2,3). (cdc.gov)
  • One of the national health objectives for the year 2000 is to reduce the average age at which children with serious hearing impairment are identified to no more than 12 months (objective 17.16) (4). (cdc.gov)
  • Since 1991, CDC's Metropolitan Atlanta Developmental Disabilities Surveillance Program (MADDSP) has monitored the prevalence of serious hearing impairment among children aged 3-10 years in the metropolitan Atlanta area. (cdc.gov)
  • This report presents findings from MADDSP for 1991-1993 (the most recent years for which data were available) about the age of diagnosis of serious bilateral hearing impairment among children born from 1981 through 1990 and highlights the public health intervention opportunity of universal newborn hearing screening programs for the earlier identification of and intervention for children with hearing impairment. (cdc.gov)
  • For surveillance purposes, MADDSP defines hearing impairment as a bilateral, pure-tone hearing loss at frequencies of 500, 1000, and 2000 Hertz averaging 40 decibels (dBs) or more, unaided, in the better ear as indicated by the results of an audiologic test. (cdc.gov)
  • For this period, MADDSP identified 413 children (283 in 1991, 288 in 1992, and 293 in 1993) who met the surveillance case definition for hearing impairment. (cdc.gov)
  • Of these, 13 (8%) children had had their hearing impairment diagnosed during their first year of life, and 81 (47%) did not have their impairment diagnosed until they were aged greater than or equal to 3 years ( Figure 1 ). (cdc.gov)
  • In general, the severity of the hearing impairment varied inversely with the child's age at diagnosis: among children with severe to profound hearing loss, the mean age at diagnosis was 2.4 years, compared with 3.6 years for children with a moderate loss. (cdc.gov)
  • Earwax is a very common cause of a conductive hearing loss which may present suddenly when the wax blocks sound from getting through the external ear canal to the middle and inner ear. (wikipedia.org)
  • Your inner ear turns these sound vibrations into nerve signals that your brain can understand as hearing. (medel.com)
  • If your child has a hearing loss, your audiologist will also likely test your child's inner ear hearing using a special bone conduction headset. (medel.com)
  • Mixed hearing loss is a combination of conductive hearing loss and inner ear hearing loss (sensorineural hearing loss). (medel.com)
  • Conductive hearing loss is a form of hearing loss that occurs when sound is unable to reach the inner ear. (signia.net)
  • This condition is usually split into two groups: inner ear and middle ear hearing loss. (signia.net)
  • Conductive hearing loss occurs when sound is not able to reach the inner ear because of something blocking the path of the sound waves in the outer ear or ear canal or middle ear. (cornerstoneaudiology.com)
  • Sensorineural hearing loss occurs when there is damage to, or degeneration of, the inner ear or the hearing nerve that connects the inner ear to the brain. (cornerstoneaudiology.com)
  • A conductive hearing loss occurs when there is a problem with the one or more of the parts of the ear that conduct sound into the inner ear. (hearingdr.com)
  • Mixed Loss can be caused by a combination of disorders including middle ear, and/or damage to the inner ear structures (cochlea) or to the auditory nerve pathway. (medtronic.com)
  • Hearing loss can be broadly separated into two categories: conductive and sensorineural (damage to tiny hair cells in the inner ear). (midwestearnosethroat.com)
  • Conductive hearing loss results when there is any problem in delivering sound energy to your cochlea, the hearing part in the inner ear. (midwestearnosethroat.com)
  • Conductive hearing loss happens when the natural movement of sound through the external ear or middle ear is blocked, and the full sound does not reach the inner ear. (midwestearnosethroat.com)
  • Conductive hearing loss occurs when sound is prevented from reaching the inner ear at full strength. (signia.net)
  • Sensorineural hearing loss is caused by damage to the inner ear (cochlea) or the nerve pathways that transmit sound from the ear to the brain. (signia.net)
  • Yes, exposure to loud noise can cause permanent damage to the inner ear and lead to hearing loss. (signia.net)
  • A loss of function within the inner ear or with the connection to the brain. (stlouischildrens.org)
  • All of these parts of the outer, middle, inner ear, and auditory nerve must be functioning for hearing to be normal. (hubpages.com)
  • Hearing aids amplify sound, but cochlear implants bypass the damaged portions of the inner ear to deliver sound directly to the auditory nerve. (hubpages.com)
  • Decreases in hearing occur due to different problems in the outer, middle, and inner ear. (harcourthealth.com)
  • Sensorineural hearing loss occurs due to damage to the inner ear. (harcourthealth.com)
  • Hearing loss that occurs when there is a problem in the way the inner ear or hearing nerve works. (cdc.gov)
  • Hearing loss that occurs when sound enters the ear normally, but because of damage to the inner ear or the hearing nerve, sound isn't organized in a way that the brain can understand. (cdc.gov)
  • Researchers found age-related hearing loss is related to a decrease in inner-ear cholesterol, and that supplements could address the issue. (hearingreview.com)
  • In January, the American Hearing Research Fund (AHRF) awarded seven grants to investigators who are exploring hearing, and hearing and balance disorders of the inner ear. (hearingreview.com)
  • Akouos is developing targeted adeno-associated viral vector (AAV)-based gene therapies for sensorineural hearing loss, which results from dysfunction or damage to sensory cells and/or nerve fibers of the inner ear. (hearingreview.com)
  • 1 The expression patterns of these genes in the inner ear can be visualized on the Hereditary Hearing Loss Homepage ( http://webh01.ua.ac.be/hhh/ ) ( Fig. 1 ). (nature.com)
  • In this type of hearing loss, blockage or physical damage to the outer, middle, inner ear, or nerve pathways can make age-related hearing damage or genetic hearing loss even worse. (hearingresearch.org)
  • Ménière disease is an inner ear disorder that affects balance and hearing. (limamemorial.org)
  • Sensorineural hearing loss (SNHL) occurs when the tiny hair cells (nerve endings) that detect sound in the inner ear are injured, diseased, do not work correctly, or have died. (limamemorial.org)
  • Acoustic trauma is injury to the hearing mechanisms in the inner ear. (limamemorial.org)
  • this is caused by damage to nerve cells of the inner ear (cochlea) and, unlike some conductive hearing disorders, cannot be treated medically. (cdc.gov)
  • There are many potential causes of conductive hearing loss, with some causes being easier to treat than others. (hearingdr.com)
  • There are numerous potential causes of conductive hearing loss (HL). (wustl.edu)
  • Common causes of conductive hearing loss include: Cerumen (earwax) or foreign body in the external auditory canal Otitis externa, infection or irritation of the outer ear Exostoses, abnormal growth of bone within the ear canal Tumor of the ear canal Congenital stenosis or atresia of the external auditory canal (narrow or blocked ear canal). (wikipedia.org)
  • Congenital conductive hearing loss is identified through newborn hearing screening or may be identified because the baby has microtia or other facial abnormalities. (wikipedia.org)
  • In children a more detailed examination may be required if the hearing loss is congenital. (wikipedia.org)
  • In newborns, congenital conductive hearing loss is generally caused by issues with the development of the outer or middle ear. (medel.com)
  • These types of hearing loss can be congenital (present at birth) or acquired (not present at birth). (stlouischildrens.org)
  • Hearing loss is present at birth (congenital) or appears sometime later in life (acquired or delayed onset). (cdc.gov)
  • Most cases of conductive hearing loss are caused by ear infections and earwax buildup, but many other factors can lead to this condition. (signia.net)
  • While some cases of conductive hearing loss are incurable, many can be cleared up with proper medical care. (signia.net)
  • Fortunately, most cases of conductive hearing loss can be improved. (midwestearnosethroat.com)
  • Objectives: The objective of this study is (1) to assess whether the presentation level of the antiphasic digits-in-noise (DIN) test affects the speech recognition threshold (SRT), (2) to evaluate how accurately simulated unilateral and bilateral conductive hearing loss is detected (CHL) and (3) to determine whether increasing the presentation level normalises the antiphasic DIN SRT. (amsterdamumc.org)
  • Neurologic exam was unremarkable other than evidence of bilateral conductive hearing loss on 512 Hz tuning fork testing. (medscape.com)
  • If the audiogram shows hearing loss in air conduction tests, but your child has normal bone conduction hearing thresholds, this means that your child has conductive hearing loss. (medel.com)
  • Generally ranges from mild to moderately severe hearing loss. (medtronic.com)
  • In general, patients with mild to moderate conductive hearing loss may be suitable for surgery, while those with severe hearing loss may not benefit as much from the procedure. (auditorey.com)
  • Cochlear implants can be an option for people who have severe hearing loss from cochlea damage and who receive little to no help from hearing aids. (hubpages.com)
  • Moderately severe hearing loss means that the quietest sound heard is between 50 and 64 dB. (harcourthealth.com)
  • Severe hearing loss describes the softest sound heard as between 65 and 79 dB. (harcourthealth.com)
  • A person with severe hearing loss will hear no speech when a person is talking at a normal level and only some loud sounds. (cdc.gov)
  • Severe hearing loss is often considered a complete loss of hearing . (hearingresearch.org)
  • Someone with severe hearing loss may be able to hear extremely loud sounds, like a fire alarm or a gunshot, but even those will sound muffled or low. (hearingresearch.org)
  • Composing music when you have a severe hearing loss can be a real challenge. (hearingreview.com)
  • Moderate-severe hearing loss (56-70 dB): Moderate-severe hearing loss may cause difficulty with speech and decreased speech intelligibility. (medscape.com)
  • Severe hearing loss (71-90 dB): Severe hearing loss may affect voice quality. (medscape.com)
  • In older children and in adults with moderate-to-profound hearing loss, hearing aids may correct up to 40-60 dB. (medscape.com)
  • Profound hearing loss means the quietest sound heard is at 80 dB or greater. (harcourthealth.com)
  • A person with a profound hearing loss will not hear any speech and only very loud sounds. (cdc.gov)
  • If people can no longer hear sounds below 91 decibels, they are said to have profound hearing loss. (hearingresearch.org)
  • Subsequently, earlier implementation of educational services and cochlear implant technology in patients with profound hearing loss now results in superior communication skills and enhanced language development. (nature.com)
  • It is usually a combination of conductive and sensorineural (nerve damage) hearing loss. (medtronic.com)
  • Age-related hearing loss, also known as presbycusis, is a common condition that affects many older adults. (signia.net)
  • Age-related hearing loss, called presbycusis, is a type of sensorineural hearing loss. (hearingresearch.org)
  • In medical terms, it is known simply as age-related hearing loss ( presbycusis ), affecting roughly one-third of adults between 65 to 70. (hearingresearch.org)
  • Age-related hearing loss, or presbycusis, is the slow loss of hearing that occurs as people get older. (limamemorial.org)
  • Examples included presbycusis, noise-induced hearing loss, Ménière disease, and retrocochlear lesions such as vestibular schwannoma. (medscape.com)
  • Sensorineural hearing loss (SNHL) cannot be treated medically. (medscape.com)
  • Conductive hearing loss treatment for outer ear infection, perforation, middle ear infection in Delhi Know the conditions and procedures for Hearing Loss & Speech Disorders consult an ENT specialist today. (oopsreviews.com)
  • Hearing disorders make it hard, but not impossible, to hear. (medlineplus.gov)
  • We care about hearing health because people with hearing disorders are at higher risk of developing delays in their receptive language, expressive language and speech which could lead to academic, social and emotional implications. (dsrf.org)
  • Test for hearing disorders shown on a chart called an audiogram. (dsrf.org)
  • Before we delve into the symptoms and treatment for conductive hearing loss, we need to understand what it is and how it can occur. (signia.net)
  • However, conductive hearing loss has a few symptoms that are more specific. (signia.net)
  • If you are experiencing symptoms untypical of conductive hearing loss, it is recommendded that you get a hearing test along with your physical examination. (signia.net)
  • Other symptoms of conductive hearing loss are ear pain or a feeling of pressure, discharge from the ear, itchy ears, or sensitivity to loud sounds (hyperacusis). (cornerstoneaudiology.com)
  • Usually only one side is affected, and the most common symptoms are vertigo with nystagmus , loss of balance , and nausea . (wikipedia.org)
  • Aetna considers laboratory testing for manganese medically necessary for persons with specific signs and symptoms of manganese toxicity (dyscoordination, loss of balance, confusion) who have a history of likely exposure to high levels of manganese (e.g., occupational exposures to manganese aerosols or dust in the welding or steel industries, exposure to high levels of manganese in contaminated drinking water, suspected manganese toxicity in persons on chronic total parenteral nutrition). (aetna.com)
  • Risk factors for the former include clinical symptoms and the main risk factors middle ear infection, trauma to the tym- for hearing loss. (who.int)
  • Conductive hearing loss usually occurs after head trauma, allergies, or after contracting ear infections like swimmer's ear. (signia.net)
  • Infections, such as swimmer's ear, causing temporary conductive hearing loss from fluid buildup in the middle ear. (hearingresearch.org)
  • Conductive hearing loss developing during childhood is usually due to otitis media with effusion and may present with speech and language delay or difficulty hearing. (wikipedia.org)
  • Manage conductive hearling loss (CHL) due to otitis media or its sequelae with a course of appropriate antibiotics. (medscape.com)
  • Comments on the high prevalence of hearing loss due to otitis media and noise exposure. (usask.ca)
  • The hearing loss is usually worse in lower frequencies. (wikipedia.org)
  • During the hearing test, your audiologist will play sounds through headphones to test your child's hearing thresholds, which tests how well they hear different frequencies across the normal range of sounds. (medel.com)
  • Modern hearing aids can selectively amplify a specified range of frequencies more than others rather than all frequencies equally. (medscape.com)
  • After the hearing aid is fitted by using proper molds, the hearing aid is tested to see how well it matches the goals for loudness at various frequencies. (medscape.com)
  • It tends to decline with age, especially the hearing of higher frequencies. (medicalnewstoday.com)
  • Sensorineural hearing loss can result in the loss of ability to hear specific frequencies of sound. (khanacademy.org)
  • Conductive hearing loss generally causes decreased perception of all frequencies of sound. (khanacademy.org)
  • Typically, it begins to develop at 4,000 hertz (Hz, or cycles per second) in the hearing range of 20 Hz to 20,000 Hz and spreads to lower and higher frequencies. (cdc.gov)
  • Depending upon the severity of the condition, different individuals are prescribed different hearing solutions. (hearingaid-guide.com)
  • The suitability of a patient for surgery will depend on various factors, including the cause and severity of the hearing loss, the overall health of the patient, and the patient's age. (auditorey.com)
  • A critical part of the evaluation will be a hearing test (audiogram) performed by an audiologist (a professional who tests hearing function) to determine the severity of your loss as well as determine if the hearing loss is conductive, sensorineural, or a mix of both. (midwestearnosethroat.com)
  • The treatment for hearing loss depends on the type and severity. (signia.net)
  • And if you have moderate-to-severe loss in air conduction thresholds, but also a mild-to-moderate loss in bone conduction thresholds, this is called mixed hearing loss. (medel.com)
  • Conductive hearing loss has normal bone-conduction thresholds, but air-conduction thresholds are poorer than normal by at least 10 dB. (medscape.com)
  • Some less frequent causes of sensorineural hearing loss are Meniere's disease or a growth on the auditory nerve. (cornerstoneaudiology.com)
  • The ear canal, ear drum, and the tiny bones in the middle ear make up the conductive system and any hearing loss caused by a problem in one or more of these areas is called a conductive hearing loss. (hearingdr.com)
  • Conductive hearing loss can be caused by various factors such as a blockage in the ear canal, a perforated eardrum, otosclerosis (a bony growth in the middle ear), or a problem with the bones in the middle ear. (auditorey.com)
  • Head trauma causing fractures to the small bones in the middle ear, disrupting normal hearing. (hearingresearch.org)
  • Acquired stenosis (narrowing) of the external auditory canal following surgery or radiotherapy Fluid accumulation is the most common cause of conductive hearing loss in the middle ear, especially in children. (wikipedia.org)
  • Mixed hearing loss is a combination of both sensorineural hearing loss and conductive hearing loss, signaling problems in both the inner auditory system and the outer ear. (cornerstoneaudiology.com)
  • [ 35 ] In mild-to-moderate hearing loss, amplification with hearing aids is used to give the child as much auditory input as possible. (medscape.com)
  • The use of hearing aids aids in connecting young children to their environment, helps maximize auditory language development if it allows them to hear any speech sounds, and uses auditory pathways to the brain, which may prevent the brain from "ignoring" them (as it does in cortically blinded laboratory animals). (medscape.com)
  • A hearing loss can happen when any part of the ear or auditory (hearing) system is not working in the usual way. (cdc.gov)
  • The auditory pathway processes sound information as it travels from the ear to the brain so that our brain pathways are part of our hearing. (cdc.gov)
  • For instance, when we are having a conversation in a busy room, the fibers of the auditory nerve help us focus on hearing one voice while ignoring other sounds. (medicalnewstoday.com)
  • Auditory Processing is the ability to identify, organize and interpret the sensory input received through hearing. (dsrf.org)
  • Hearing loss can occur when a part of the auditory system isn't functioning as it should. (hearingresearch.org)
  • Sensorineural hearing loss is secondary to cochlear abnormalities and/or an abnormality of the auditory nerve or central auditory pathways. (medscape.com)
  • This hearing loss can be temporary or chronic and can have many different causes, such as atresia, microtia, or middle ear infections. (medel.com)
  • While many cases are temporary or completely curable, some result in lasting damage and permanent hearing loss. (signia.net)
  • Most of the time, this type of hearing loss is temporary because the right treatment can cure it. (cornerstoneaudiology.com)
  • Provide temporary relief - While waiting for the results of surgery to take effect, hearing aids can provide temporary relief for those with conductive hearing loss. (auditorey.com)
  • The hearing loss could be temporary or permanent. (hearingresearch.org)
  • Temporary or persistent hearing loss as a result of MEE causes speech, language and learning delays in children. (bvsalud.org)
  • Conductive hearing loss (CHL) occurs when there is a problem transferring sound waves anywhere along the pathway through the outer ear, tympanic membrane (eardrum), or middle ear (ossicles). (wikipedia.org)
  • Conductive hearing loss is secondary to an outer ear or middle ear abnormality, which can include abnormalities of the tympanic membrane. (medscape.com)
  • Having both a conductive and sensorineural type of hearing loss. (dsrf.org)
  • Later onset of conductive hearing loss may have an obvious cause such as an ear infection, trauma or upper respiratory tract infection or may have an insidious onset related to chronic middle ear disease, otosclerosis or a tumour of the naso-pharynx. (wikipedia.org)
  • Strange odors or fluids leaking from the ear - which is typical of conductive hearing loss caused by infection or impaction. (signia.net)
  • Malformation of the outer or middle ear structures, a middle ear infection in which fluid accumulates behind the eardrum, abnormal bone growth in the middle ear, a hole in the eardrum, or poor Eustachian tube function may be responsible for conductive hearing loss. (hearingdr.com)
  • For example: if the cause of conductive hearing loss is excessive accumulation of earwax, or due to ear infection, antibiotics are recommended at first, then surgical procedures are presented to an individual. (hearingaid-guide.com)
  • An example of mixed hearing loss is if you work in a loud environment and have an ear infection at the same time. (harcourthealth.com)
  • Treatment of this hearing loss usually involves wax removal, wax softener or removing the fluid and preventing infection with surgical tubes or antibiotics. (dsrf.org)
  • Moderate hearing loss describes the softest sound heard as between 35 and 49 dB. (harcourthealth.com)
  • Also, the study found that moderate hearing loss triples dementia risk. (harcourthealth.com)
  • A person with a moderate hearing loss may hear almost no speech when another person is talking at a normal level. (cdc.gov)
  • Many of these jobs are loud environments that can also lead to permanent or moderate hearing loss in employees. (reichandbinstock.com)
  • The inability to hear sounds under 41 to 55 decibels is moderate hearing loss. (hearingresearch.org)
  • Moderate hearing loss (41-55 dB): Moderate hearing loss may affect language development, syntax and articulation, interaction with peers, and self-esteem. (medscape.com)
  • However, if the hearing loss is sudden, please see an audiologist or ENT doctor as soon as possible. (cornerstoneaudiology.com)
  • It is important to see a doctor or audiologist for a hearing test as they are the only ones who will do a full assessment of every aspect of your hearing and recommend the best way to protect and optimize your hearing health. (cornerstoneaudiology.com)
  • It is important to consult with an experienced ear, nose, and throat (ENT) specialist or an audiologist to determine if conductive hearing loss surgery is suitable for you. (auditorey.com)
  • Consultation with an ENT specialist or audiologist is recommended to determine if conductive hearing loss surgery is right for you. (auditorey.com)
  • The person must then go to a Connecticut Medicaid participating hearing aid vendor (audiologist/hearing aid dealer) for testing and possible hearing aids. (hearingloss.org)
  • Typically, the degree of hearing loss is measured in decibels (dB) which are confirmed through a hearing exam with an audiologist. (hearingresearch.org)
  • Children for whom test results are not available but for whom records include a description, by a licensed or certified audiologist or qualified physician, of a hearing loss of greater than or equal to 40 dBs in their better ear also are considered to be hearing impaired. (cdc.gov)
  • These factors included panic membrane, foreign body impaction family history of consanguinity between in the external canal and consanguineous parents or hearing problems, and history of marriages, while those for sensorineural ear surgery, infections, trauma, admission include viral neuritis, fracture base, ototoxic to fever hospital and intramuscular injection drugs, noise exposure and tumours of the of antibiotics. (who.int)
  • Conductive hearing loss is common in both children and adults. (medel.com)
  • For children and adults, acquired conductive hearing loss can be caused by infections or disease of the middle ear. (medel.com)
  • Statistics show that 16% of adults suffer from hearing issues - double the amount of people with diabetes or cancer. (cornerstoneaudiology.com)
  • If you're one of the many adults who experience hearing loss in one or both ears, you may be wondering what type of hearing loss you have. (cornerstoneaudiology.com)
  • If it's conductive hearing loss , the biggest thing adults first notice is that the quality of the sounds they hear isn't as good as it should be. (cornerstoneaudiology.com)
  • Prevention protects your brain health and reduces the risk of the ways hearing loss can affect older adults. (cornerstoneaudiology.com)
  • In fact, many deaf adults use their hearing aids selectively or not at all because they find that the extraneous noises and distortions they hear are more bothersome than helpful. (medscape.com)
  • Losing your hearing impacts your quality of life and is a suspected cause of dementia in older adults . (hearingresearch.org)
  • Study sample: Twenty-four and twelve normal hearing adults. (amsterdamumc.org)
  • State Medicaid Coverage of Hearing Services for Adults (21 and older). (hearingloss.org)
  • While age is a strong predictor of hearing loss among adults, it can also come from heredity, injury, or disease. (hearingresearch.org)
  • Hearing loss or hearing troubles affects roughly 15 percent of American adults, which is approximately 37.5 million people. (hearingresearch.org)
  • But hearing loss doesn't affect adults only. (hearingresearch.org)
  • As mentioned before, conductive hearing loss can occur in two areas. (signia.net)
  • Sensorineural and conductive hearing loss can occur in tandem in a condition called mixed hearing loss . (signia.net)
  • How Does Conductive Hearing Loss Occur? (cornerstoneaudiology.com)
  • Hearing loss can occur in children at any age, and it can have a significant impact on their development and learning. (signia.net)
  • An audiogram can show if your child has hearing loss, what type of hearing loss your child might have, and it can help identify an appropriate hearing solution. (medel.com)
  • The two most common causes of hearing loss are conductive and sensorineural, and each type is caused by different factors. (cornerstoneaudiology.com)
  • In this post, we'll look at these two kinds of hearing loss, and we'll explain what each type is and how it's caused. (cornerstoneaudiology.com)
  • Unfortunately, this type of hearing loss usually has no cure, but definite steps can be taken to make sure it doesn't get worse. (cornerstoneaudiology.com)
  • Read more about each type of hearing loss and consult your physician to find out if bone conduction hearing therapy is an option for you. (medtronic.com)
  • The type of surgery required will depend on the specific cause of the hearing loss. (auditorey.com)
  • However, the type of hearing loss a person has can influence how their hearing is affected. (signia.net)
  • This type of hearing loss is usually permanent and can be caused by exposure to loud noises, aging, or certain medical conditions. (signia.net)
  • Conductive hearing loss is the most common type of hearing loss in children and is usually acquired. (stlouischildrens.org)
  • This type of hearing loss benefits from hearing aids. (harcourthealth.com)
  • This represents the most common type of permanent hearing loss. (harcourthealth.com)
  • This type of hearing loss can often be treated with medicine or surgery. (cdc.gov)
  • The type of hearing loss you experience depends on the structures in the ear that are damaged. (hearingresearch.org)
  • This is an incredibly significant type of hearing loss that makes it impossible to hear another person talking. (hearingresearch.org)
  • Type II - diminished hearing that does not worsen with time, and Type III -progressive decrease in hearing). (hearingreview.com)
  • The hearing aid vendor fits the person and then specifies the type of hearing aid that would be the most beneficial. (hearingloss.org)
  • The type of hearing loss will determine the type of treatment a person seeks. (hearingresearch.org)
  • In short, this type of hearing loss combines conductive and sensorineural hearing loss. (hearingresearch.org)
  • This type of hearing loss makes it difficult to hear soft sounds. (hearingresearch.org)
  • Another type of hearing loss to mention is noise-induced hearing loss (NIHL), which is triggered by an extremely loud noise. (hearingresearch.org)
  • This type of hearing loss often cannot be reversed. (limamemorial.org)
  • ardized interview questionnaire, whom in- The risk factors for conductive and sen- cluded demographic data (age, sex, school sorineural hearing loss are mutually exclu- type, number of siblings and order of birth), sive. (who.int)
  • Because, in this type of hearing loss, the outer ear and middle ear do not reduce the signal intensity of the air-conducted signal, both air- and bone-conducted signals are effective in stimulating the cochlea. (medscape.com)
  • This type of hearing loss has sensorineural and conductive components. (medscape.com)
  • Audiologic testing confirmed mild conductive hearing loss and flat tympanograms (type B) binaurally. (medscape.com)
  • Conductive hearing loss can also be present at birth, usually caused by afflictions like microtia (an underdeveloped ear), and stenosis (narrow ear canal). (signia.net)
  • Hemifacial microsomia syndrome can include preauricular sinuses, facial nerve palsy, sensorineural hearing loss, microtia or anotia, cervical appendages containing cartilage, and other defects. (medscape.com)
  • This comprehensive guide offers a range of resources and supports for individuals and families affected by conductive hearing loss, including local resources, social workers' roles, organizations advocating for hearing loss, and charitable programs providing hearing aids. (hearing.quest)
  • Hearing instruments may not meet the needs of all hearing-impaired individuals. (andersonaudiology.com)
  • Individuals suffering from Conductive Hearing Loss tend to hear louder volumes with the hope to improve their hearing ability. (hearingaid-guide.com)
  • Conductive hearing loss surgery is suitable for individuals who have been diagnosed with conductive hearing loss and are looking for a permanent solution to their hearing difficulties. (auditorey.com)
  • During this time, hearing aids can play an important role in helping individuals recover their hearing. (auditorey.com)
  • Enhance speech clarity - Hearing aids can help enhance speech clarity, making it easier for individuals to understand what is being said. (auditorey.com)
  • Individuals with normal hearing can detect soft sounds at -10 to 25 dB. (harcourthealth.com)
  • Individuals with mild loss notice some trouble hearing conversations in a noisy environment. (harcourthealth.com)
  • These individuals will often need powerful hearing aids. (harcourthealth.com)
  • Individuals with severe loss had a five times greater risk of developing dementia. (harcourthealth.com)
  • Many individuals with untreated hearing loss also experience psychosocial effects. (harcourthealth.com)
  • Individuals that don't have dangerous occupations can also be at risk of losing sight or hearing in a car accident or other catastrophic accidents. (reichandbinstock.com)
  • Hearing loss can affect individuals in different ways, depending on the cause of the hearing loss. (hearingresearch.org)
  • For threshold testing intensity, decibels are measured in hearing level (HL), which is based on the standardized average of individuals with normal hearing sensitivity. (medscape.com)
  • Hearing impairments were up only 12.8 percent of the U.S. population, they widespread--one-third of all persons 70 years of age account for roughly 37 percent of all hearing-im- and older were hearing paired individuals and 30 percent of all visually- impaired, a level that has impaired individuals. (cdc.gov)
  • This is different from "sensorineural" hearing loss which refers to problems with the nerve connections between the eardrum and brain. (alleydog.com)
  • Birth defects, tumors around the hearing nerve, head injuries or diseases, or an unknown reason. (medtronic.com)
  • In the patient with a conductive HL and at least partially intact reflexes, superior semicircular canal dehiscence, fracture of the stapes superstructure proxi- mal to the tendon, other third window phenomena, and now dehiscence of the facial nerve resulting in decreased mobility of the ossicular chain must be considered. (wustl.edu)
  • The results of their research, reported August 22 in "Neuron," reveal that TMC1, a protein discovered in 2002, forms a sound- and motion-activated pore that allows the conversion of sound and head movement into nerve signals that travel to the brain-a signaling cascade that enables hearing and balance. (hearingreview.com)
  • More often a permanent cause of hearing loss, due to issues with the nerve pathways to the brain. (dsrf.org)
  • Loss of the hearing you have left, ringing in your ears also called tinnitus or leaks in the fluid around the brain. (hubpages.com)
  • A one-time exposure to loud noises can result in tinnitus and hearing loss if the damage to the cochlea is severe. (hearingresearch.org)
  • Tinnitus is the medical term for "hearing" noises in your ears. (limamemorial.org)
  • Sensorineural hearing loss is always permanent, while conductive hearing loss can usually be cured with procedures, surgery, and antibiotics. (signia.net)
  • Being common in children, Conductive Hearing loss occurs in every 5 children out of 1000. (hearingaid-guide.com)
  • Conductive hearing loss is common in the child because of their unhealthy lifestyle such as inserting every object in the ears canal. (hearingaid-guide.com)
  • Common reasons for conductive hearing loss include blockage of your ear canal, a hole in your ear drum, problems with three small bones in your ear, or fluid in the space between your ear drum and cochlea. (midwestearnosethroat.com)
  • In this article, we explore the anatomy of the ear, describe how hearing works, and investigate common causes of hearing loss. (medicalnewstoday.com)
  • The most common injuries that can cause vision loss to off-shore workers are particles in the eye, fractured eye sockets from blunt force trauma, lacerations, and an abraded cornea. (reichandbinstock.com)
  • Hearing loss is the most common sensory disorder. (nature.com)
  • Less common hearing loss in Down syndrome but overall, rates much higher than the general population (15 - 20%) due to a higher risk of health complications. (dsrf.org)
  • How Common Is Hearing Loss? (hearingresearch.org)
  • Sensorineural hearing loss is an extremely common disorder, with a spectrum of effect ranging from an almost undetectable degree of disability to a pro- found alteration in the ability to function in There are around 1.5 million inhabitants of the society. (who.int)
  • An audiogram is a diagram used by hearing professionals to show how well your child can hear. (medel.com)
  • Every person's hearing is unique, which means there are countless possibilities for audiogram results. (medel.com)
  • Hearing sensitivity is plotted on an audiogram, which is a graph displaying intensity as a function of frequency. (medscape.com)
  • Audiogram depicting a mild rising conductive hearing loss in the left ear. (medscape.com)
  • Audiogram depicting a high-frequency sloping sensorineural hearing loss in the left ear. (medscape.com)
  • The audiogram is a chart of hearing sensitivity with frequency charted on the abscissa and intensity on the ordinate (see images shown above). (medscape.com)
  • However, cases of permanent or chronic conductive hearing loss may require other treatment modalities such as hearing aid devices to improve detection of sound and speech perception. (wikipedia.org)
  • If you are seeking treatment for conductive hearing loss, your doctor might test you for sensorineural damage as well. (signia.net)
  • During this hearing test, your hearing care professional will determine if you have conductive, sensorineural, or both types of hearing loss and recommend the best treatment plan . (cornerstoneaudiology.com)
  • Treatment for conductive hearing loss varies based on the circumstances. (hearingdr.com)
  • But there are cases, where medical treatment isn't suggested and the use of hearing aids or hearing amplifiers, even hearing implants are recommended by the doctor. (hearingaid-guide.com)
  • Traditional hearing aids benefit many people, but others may need more advanced treatment or a combination approach. (medtronic.com)
  • The degree of hearing loss affects the treatment, but options are traditional aids or bone-anchored hearing system (BAHS). (medtronic.com)
  • If you have been diagnosed with conductive hearing loss, mixed hearing loss, or single-sided sensorineural hearing loss, bone conduction hearing therapy with the Alpha 2 MPO ePlusâ„¢ bone-anchored hearing aid might be the right treatment for you. (medtronic.com)
  • If you are experiencing hearing loss, you should see an ENT (ear, nose, and throat) specialist, or otolaryngologist, who can make a specific diagnosis for you, and talk to you about treatment options, including surgical procedures. (midwestearnosethroat.com)
  • Based on the results of your hearing test and what your ENT specialist's examination shows, as well as results from other potential tests such as imaging your ears with a CT or MRI, the specialist will make various recommendations for treatment options. (midwestearnosethroat.com)
  • In some cases, hearing loss can be reversed with medical treatment or surgery. (signia.net)
  • A visit hearing care professional is the first step to identifying the best treatment option. (signia.net)
  • Early identification of hearing problems and treatment decreases medical and psychosocial problems. (harcourthealth.com)
  • Treatment or surgery can often reverse this kind of hearing loss. (medlineplus.gov)
  • A state must provide to Medicaid beneficiaries under age 21 hearing services, including appropriate screening, diagnostic, and treatment, including hearing aids. (hearingloss.org)
  • Treatment for conductive hearing loss varies. (hearingresearch.org)
  • Conductive Hearing Loss occurs when there is a physical problem conducting sound waves through the ear mechanisms (outer ear, eardrum, middle ear ). (alleydog.com)
  • But usually, especially with sensorineural hearing loss , it is permanent and can only be managed with hearing aids or cochlear implants. (signia.net)
  • They often need very strong hearing aids or cochlear implants. (harcourthealth.com)
  • Lin FR, Niparko JK, Ferrucci L. Hearing loss prevalence in the United States. (medtronic.com)
  • The prevalence of hearing loss in several school year, 10% of the students in each countries has been estimated as 4%, 7.9% school year were randomly selected. (who.int)
  • Conclusion: There is a high prevalence of MEE among children with adenoid hypertrophy but no significant association with hearing loss. (bvsalud.org)
  • Can hearing loss be hereditary? (signia.net)
  • She has a familial, hereditary, sensorineural hearing loss. (hubpages.com)
  • Hereditary Hearing Loss Homepage, 2003. (nature.com)
  • Unlike sensorineural hearing loss, which often leads to issues hearing certain pitches, voices, or consonants, conductive hearing loss usually leads to the muffling of sound in general. (signia.net)
  • Because hearing is a function of both mechanical components of the ossicles and neural components of the cochlea, hearing loss can be either conductive (a complication with the physical aspect of hearing), or sensorineural (a problem with the neural component of hearing). (khanacademy.org)
  • Hearing loss can generally be categorized as conductive, cochlear, and retrocochlear. (cdc.gov)
  • Conductive hearing loss can be due to trauma or injury to the ear and can also happen because of a blockage in the ear canal from earwax or a foreign object. (hearingresearch.org)
  • Medically necessary hearing aid services, including hearing aids and hearing aid accessories and services. (hearingloss.org)
  • These services must be determined medically necessary, prescribed, and ordered by a physician or other licensed health care practitioner trained to administer hearing assessments and evaluations within the scope of the practitioner's license. (hearingloss.org)
  • Enlarged vestibular aqueduct Labyrinthine fistula Conductive hearing loss makes all sounds seem faint or muffled. (wikipedia.org)
  • Among the four types of hearing loss, conductive hearing loss is the most easily treated. (signia.net)
  • Often, people with all types of hearing loss struggle to hear soft sounds and high-pitched sounds such as whispers, children's voices, or birdsong. (signia.net)
  • What are the different types of hearing loss? (stlouischildrens.org)
  • The first thing you might notice is difficulty hearing in noisy environments. (cornerstoneaudiology.com)
  • Mild hearing loss (26-40 dB): Mild hearing loss may cause inattention, difficulty suppressing background noise, and increased listening efforts. (medscape.com)
  • More severe barotrauma can lead to middle ear fluid or even permanent sensorineural hearing loss. (wikipedia.org)
  • Problems with the middle ear can also lead to conductive hearing loss. (signia.net)
  • Conductive hearing loss usually happens to an individual when the outer ear or the middle functioning is abrupt. (hearingaid-guide.com)
  • The inability of the middle or outer ear is the cause of conductive hearing loss. (hearingaid-guide.com)
  • Stapedectomy - This procedure is used to treat otosclerosis, a condition in which there is a bony growth in the middle ear that interferes with the normal movement of the bones involved in hearing. (auditorey.com)
  • With conductive hearing loss , sounds can't get through the outer and middle ear as normal. (harcourthealth.com)
  • Hearing loss caused by something that stops sounds from getting through the outer or middle ear. (cdc.gov)
  • You have conductive hearing loss if a hearing loss happens due to damage to the outer or middle ear structures. (hearingresearch.org)
  • Hearing loss caused by sounds unable to pass through the outer and middle ear is called conductive hearing loss . (hearingresearch.org)
  • Conductive hearing loss (CHL) occurs because of a mechanical problem in the outer or middle ear. (limamemorial.org)