Caloric Tests
Electronystagmography
Nystagmus, Physiologic
Vertigo
Vestibular Diseases
Caloric Restriction
Air
Caloric value of inulin and oligofructose. (1/58)
Dietary carbohydrates, which are absorbed as hexose, (glucose, fructose) have a caloric value of 3.9 kcal/g (16.3 kJ/g), and their cellular metabolism produces approximately 38 mol ATP/mol. However, chicory inulin and oligofructose resist digestion and they are not absorbed in the upper part of the gastrointestinal tract. After oral ingestion, they reach the colon intact where they become hydrolyzed and extensively fermented by saccharolytic bacteria, which produce short-chain carboxylic and lactic acids as electron sinks. Depending on both the degree of their colonic fermentation and the assumptions of the model used, the caloric value of such nondigested but fermented carbohydrates varies between 0 and 2.5 kcal/g. Through the catabolism of the absorbed short-chain carboxylic and lactic acids, they may produce up to 17 mol ATP/mol of fermented sugar moiety. Because the daily intake of these dietary carbohydrates is likely to remain relatively small (<10% and probably often not >5% of total daily calorie intake), it is of low relevance nutritionally to give them a precise caloric value. On the basis of biochemical balance charts for carbon atoms, metabolic pathways and energy yields to the host, the caloric value of a fructosyl residue in chicory inulin and oligofructose has been calculated to be approximately 25-35% that of a fully digested and absorbed fructose molecule. For the purpose of food labeling, it is recommended that chicory inulin and oligofructose, like all the other carbohydrates that are more or less completely fermented in the human colon, should be given a caloric value of 1.5 kcal/g (6.3 kJ/g). (+info)Cerebral representations for egocentric space: Functional-anatomical evidence from caloric vestibular stimulation and neck vibration. (2/58)
The internal representation of space involves the integration of different sensory inputs-visual, somatosensory/proprioceptive, vestibular-yielding reference frames which are not based on individual peripheral sensory codes, being organized instead in ego-centred (e.g. head, trunk, arm) and object- or environment-centred coordinates. Lateralized or direction-specific stimulation of peripheral sensory systems, such as caloric vestibular stimulation (CVS), posterior neck muscle mechanical vibration (NV) and optokinetic stimulation, can induce a distortion of egocentric coordinates, causing, for example, a deviation of the subjective straight ahead in pointing tasks. Appropriate forms of this stimulation can also temporarily improve a variety of pathological manifestations of unilateral neglect. We used PET measurements of regional cerebral blood flow changes in normal volunteers to measure the brain responses shared by CVS and NV. We show that somatosensory areas of the perisylvian cortex including the insula and retroinsular cortex, the temporoparietal junction and somatosensory area II receive signals from both sensory channels. We propose that these anatomical sites contribute to egocentric representation of space. (+info)Neurotoxic mechanism of cinnabar and mercuric sulfide on the vestibulo-ocular reflex system of guinea pigs. (3/58)
Cinnabar, a naturally occurring mercuric sulfide (HgS), has been combined with Chinese herbal medicine as a sedative for more than 2000 years. To date, its neurotoxic effect on the vestibulo-ocular reflex (VOR) system has not been reported. By means of a caloric test coupled with electronystagmographic recordings, the effect of commercial HgS and cinnabar on the VOR system of guinea pigs was studied. HgS or cinnabar was administered orally (1.0 g/kg) to Hartley-strain guinea pigs once daily for 7 consecutive days. A battery of electrophysiological, biochemical, and histopathological examinations were performed. The results showed that HgS induced a 60% caloric response abnormality (40% caloric hyperfunction and 20% hypofunction), whereas the abnormal responses appeared to be more severe (six out of six) in the cinnabar group. The Hg contents of whole blood and cerebellum were increased and correlated to their neurotoxic effects on the VOR system, indicating that both insoluble HgS and cinnabar could be absorbed from the gastrointestinal tract and distributed to the cerebellum. Although the vestibular labyrinth revealed no remarkable change under light microscopy, loss of Purkinje cells in the cerebellum was detected, and the enzymatic Na(+)/K(+)-ATPase activity of cerebellum (a higher inhibitory center of the VOR system) was significantly inhibited by HgS and cinnabar. Moreover, cerebellar nitric oxide (NO) production was increased significantly. Hence, we tentatively conclude that the increased Hg contents in the cerebellum following oral administration of HgS and cinnabar were responsible, at least in part, for the detrimental neurotoxic effect on the VOR system. Potentially, decreasing Na(+)/K(+)-ATPase activity and increasing NO production within the cerebellar regulatory center are postulated to mediate this VOR dysfunction caused by the mercurial compounds and cinnabar. (+info)A new light on caloric test--what was disclosed by three dimensional analysis of caloric nystagmus? (4/58)
For better understanding of caloric nystagmus, this phenomenon will be reviewed historically in three stages. 1) The first light on caloric nystagmus was thrown by Barany 1906. Through direct observation of eye movements, Barany established the caloric test as an important tool to determine the side of lesion for vertigo. 2) The second light is shed by electrooculogram (EOG) from the late 1950th. EOG enabled qualitative analysis of caloric nystagmus, and proved Barany's convection theory, but resulted in neglect of vertical and roll eye movements. 3) The third light is gained by 3D recording of eye movements started from the late 1980th. 3D recordings of eye movements enabled us to analyze the spatial orientation of caloric nystagmus, and disclose the close correlation of the nystagmus components in the head vertical and the space vertical planes, suggesting a contribution of the velocity storage integrator. The 3D property of caloric nystagmus will be explained in detail. (+info)Perspectives for the comprehensive examination of semicircular canal and otolith function. (5/58)
A review is presented on the three-dimensional aspects of the vestibulo-oculomotor system and the current functional tests for unilateral examination of the individual receptors in the vestibular labyrinth. In the presentation, attention is directed towards the recently developed vestibular tests, which promise a more comprehensive examination of labyrinth function. More explicitly, unilateral tests for the utricle, saccule and the individual semicircular canals are discussed. Caloric irrigation and rotatory testing are widely used as tests for the integrity of the (horizontal) semicircular canals. Little useful diagnosis is made however on the vertical canals, not to mention the otolith organs. A promising approach to the examination of individual semicircular canal function has been described. This involves the perception of self-rotation in each of the planes of the semicircular canals. The patient/subject is rotated by an arbitrary amount on a standard Barany chair and then required to return the chair to its original position, by joystick control of the chair velocity. In order to test the vertical canals, the head of the subject/patient is positioned so that the plane of each canal lies in the plane of rotation. A promising unilateral test of saccular function involves the use of vestibular evoked myogenic potentials. Here it has been demonstrated that the saccules can be activated using brief, high-intensity acoustic clicks. The myogenic potential is measured using surface electrodes over the sternocleidomastoid muscles. Initial data from patients has indicated that the test is specific for unilateral saccule disorders. The unilateral test of utricle function is based on the eccentric displacement profile. Thus, eccentric displacement of the head to 3.5 cm during constant velocity rotation about the earth-vertical axis generates an adequate unilateral stimulation of the otolith organ, without involving the semicircular canals. This paradigm has also proved efficient in localizing peripheral otolith dysfunction by means of SVV estimation. This represents a novel test of otolith function that can be easily integrated into routine clinical testing. In contrast to the otolith-ocular response, the subjective visual vertical also reflects the processing of otolithic information in the higher brain centres (thalamus, vestibular cortex). Exploitation of the two complementary approaches therefore provides useful information for both experimental and clinical scientists. Of direct interest is the finding that testing with the subject rotating on-centre is sufficient to localize peripheral otolith dysfunction by means of SVV estimation. This represents a novel test of otolith function that can be easily integrated into routine clinical testing. In addition to caloric testing, which has remained the classical unilateral test of vestibular function, the newly developed tests should improve the differential diagnosis of vestibular disorders. (+info)Dominance for vestibular cortical function in the non-dominant hemisphere. (6/58)
The aim of this (15)O-labelled H(2)O bolus positron emission tomography (PET) study was to analyse the hemispheric dominance of the vestibular cortical system. Therefore, the differential effects of caloric vestibular stimulation (right or left ear irrigation with warm water at 44 degrees C) on cortical and subcortical activation were studied in 12 right-handed and 12 left-handed healthy volunteers. Caloric irrigation induces a direction-specific sensation of rotation and nystagmus. Significant regional cerebral blood flow increases were found in a network within both hemispheres, including the superior frontal gyrus/sulcus, the precentral gyrus and the inferior parietal lobule with the supramarginal gyrus. These areas correspond best to the cortical ocular motor centres, namely the prefrontal cortex, the frontal eye field and the parietal eye field, known to be involved in the processing of caloric nystagmus. Furthermore, distinct temporo-parietal activations could be separated in the posterior part of the insula with the adjacent superior temporal gyrus, the inferior parietal lobule and precuneus. These areas fit best to the human homologues of multisensory vestibular cortex areas identified in the monkey and correspond to the parieto-insular vestibular cortex (PIVC), the visual temporal sylvian area (VTS) and areas 7 and 6. Further cortical activations were seen in the anterior insula, the inferior frontal gyrus and anterior cingulum. The subcortical activation pattern in the putamen, thalamus and midbrain is consistent with the organization of efferent ocular motor pathways. Cortical and subcortical activation of the described areas was bilateral during monaural stimulation, but predominant in the hemisphere ipsilateral to the stimulated ear and exhibited a significant right hemispheric dominance for vestibular and ocular motor structures in right-handed volunteers. Similarly, a significant left hemispheric dominance was found in the 12 left-handed volunteers. Thus, this PET study showed for the first time that cortical and subcortical activation by vestibular caloric stimulation depends (i) on the handedness of the subjects and (ii) on the side of the stimulated ear. Maximum activation was therefore found when the non-dominant hemisphere was ipsilateral to the stimulated ear, i.e. in the right hemisphere of right-handed subjects during caloric irrigation of the right ear and in the left hemisphere of left-handed subjects during caloric irrigation of the left ear. The localization of handedness and vestibular dominance in opposite hemispheres might conceivably indicate that the vestibular system and its hemispheric dominance, which matures earlier during ontogenesis, determine right- or left-handedness. (+info)Treatment of anterior canal benign paroxysmal positional vertigo by a prolonged forced position procedure. (7/58)
This report presents a therapeutic procedure for refractory benign paroxysmal positional vertigo (antBPPV) of the anterior canal. Two patients with refractory antBPPV were treated by a prolonged forced position procedure (PFPP). The technique is based on the assumption that the pathophysiological mechanism of antBPPV is similar to that generating posterior canal canalolithiasis. The patients recovered from refractory antBPPV after one or more PFPPs. The rationale for this therapy is that when the patient lies in the proposed forced position, the affected anterior canal is uppermost in an almost gravitationally vertical position. If the patient remains in this position for several hours, the floating particles lying in the non-ampullary arm of the canal can gradually slip out of the canal towards the vestibule due to gravity. We recommend trying PFPP when the side of lithiasis cannot be determined, in cases that are resistant to particle repositioning canal manoeuvres, and before considering canal plugging for refractory antBPPV. (+info)Methylprednisolone, valacyclovir, or the combination for vestibular neuritis. (8/58)
BACKGROUND: Vestibular neuritis is the second most common cause of peripheral vestibular vertigo. Its assumed cause is a reactivation of herpes simplex virus type 1 infection. Therefore, corticosteroids, antiviral agents, or a combination of the two might improve the outcome in patients with vestibular neuritis. METHODS: We performed a prospective, randomized, double-blind, two-by-two factorial trial in which patients with acute vestibular neuritis were randomly assigned to treatment with placebo, methylprednisolone, valacyclovir, or methylprednisolone plus valacyclovir. Vestibular function was determined by caloric irrigation, with the use of the vestibular paresis formula (to measure the extent of unilateral caloric paresis) within 3 days after the onset of symptoms and 12 months afterward. RESULTS: Of a total of 141 patients who underwent randomization, 38 received placebo, 35 methylprednisolone, 33 valacyclovir, and 35 methylprednisolone plus valacyclovir. At the onset of symptoms there was no difference among the groups in the severity of vestibular paresis. The mean (+/-SD) improvement in peripheral vestibular function at the 12-month follow-up was 39.6+/-28.1 percentage points in the placebo group, 62.4+/-16.9 percentage points in the methylprednisolone group, 36.0+/-26.7 percentage points in the valacyclovir group, and 59.2+/-24.1 percentage points in the methylprednisolone-plus-valacyclovir group. Analysis of variance showed a significant effect of methylprednisolone (P<0.001) but not of valacyclovir (P=0.43). The combination of methylprednisolone and valacyclovir was not superior to corticosteroid monotherapy. CONCLUSIONS: Methylprednisolone significantly improves the recovery of peripheral vestibular function in patients with vestibular neuritis, whereas valacyclovir does not. (+info)Caloric tests are a type of diagnostic test used in otology and neurotology to evaluate the function of the vestibular system, which is responsible for maintaining balance and eye movements. The tests involve stimulating the vestibular system with warm or cool air or water, and then observing and measuring the resulting eye movements.
During the test, the patient sits in a chair with their head tilted back at a 30-degree angle. A special goggles device is placed over their eyes to measure and record eye movements. Then, warm or cool air or water is introduced into each ear canal, alternately, for about 20-30 seconds.
The stimulation of the inner ear with warm or cold temperatures creates a difference in temperature between the inner ear and the brain, which activates the vestibular system and causes eye movements called nystagmus. The direction and intensity of the nystagmus are then analyzed to determine if there is any damage or dysfunction in the vestibular system.
Caloric tests can help identify lesions in the vestibular system, such as vestibular neuritis or labyrinthitis, and can also help differentiate between peripheral and central vestibular disorders.
Electronystagmography (ENG) is a medical test used to assess the function of the vestibular system, which is responsible for maintaining balance and eye movements. This test measures involuntary eye movements, called nystagmus, which can be indicative of various conditions affecting the inner ear or brainstem.
During the ENG test, electrodes are placed around the eyes to record eye movements while the patient undergoes a series of stimuli, such as changes in head position, visual stimuli, and caloric irrigations (where warm or cool water is introduced into the ear canal to stimulate the inner ear). The recorded data is then analyzed to evaluate the function of the vestibular system and identify any abnormalities.
ENG testing can help diagnose conditions such as vestibular neuritis, labyrinthitis, benign paroxysmal positional vertigo (BPPV), Meniere's disease, and other balance disorders. It is also used to assess the effectiveness of various treatments for these conditions.
Physiologic nystagmus is a type of normal, involuntary eye movement that occurs in certain situations. It is characterized by rhythmical to-and-fro movements of the eyes, which can be horizontal, vertical, or rotatory. The most common form of physiologic nystagmus is called "optokinetic nystagmus," which occurs when a person looks at a moving pattern, such as stripes on a rotating drum or scenery passing by a car window.
Optokinetic nystagmus helps to stabilize the image of the environment on the retina and allows the brain to perceive motion accurately. Another form of physiologic nystagmus is "pursuit nystagmus," which occurs when the eyes attempt to follow a slowly moving target. In this case, the eyes may overshoot the target and then make a corrective movement in the opposite direction.
Physiologic nystagmus is different from pathological nystagmus, which can be caused by various medical conditions such as brain damage, inner ear disorders, or medications that affect the nervous system. Pathological nystagmus may indicate a serious underlying condition and should be evaluated by a healthcare professional.
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.
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.
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.
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.
Caloric restriction refers to a dietary regimen that involves reducing the total calorie intake while still maintaining adequate nutrition and micronutrient intake. This is often achieved by limiting the consumption of high-calorie, nutrient-poor foods and increasing the intake of nutrient-dense, low-calorie foods such as fruits, vegetables, and lean proteins.
Caloric restriction has been shown to have numerous health benefits, including increased lifespan, improved insulin sensitivity, reduced inflammation, and decreased risk of chronic diseases such as cancer, diabetes, and heart disease. It is important to note that caloric restriction should not be confused with starvation or malnutrition, which can have negative effects on health. Instead, it involves a careful balance of reducing calorie intake while still ensuring adequate nutrition and energy needs are met.
It is recommended that individuals who are considering caloric restriction consult with a healthcare professional or registered dietitian to ensure that they are following a safe and effective plan that meets their individual nutritional needs.
In medical terms, 'air' is defined as the mixture of gases that make up the Earth's atmosphere. It primarily consists of nitrogen (78%), oxygen (21%), and small amounts of other gases such as argon, carbon dioxide, and trace amounts of neon, helium, and methane.
Air is essential for human life, as it provides the oxygen that our bodies need to produce energy through respiration. We inhale air into our lungs, where oxygen is absorbed into the bloodstream and transported to cells throughout the body. At the same time, carbon dioxide, a waste product of cellular metabolism, is exhaled out of the body through the lungs and back into the atmosphere.
In addition to its role in respiration, air also plays a critical role in regulating the Earth's climate and weather patterns, as well as serving as a medium for sound waves and other forms of energy transfer.
"Energy intake" is a medical term that refers to the amount of energy or calories consumed through food and drink. It is an important concept in the study of nutrition, metabolism, and energy balance, and is often used in research and clinical settings to assess an individual's dietary habits and health status.
Energy intake is typically measured in kilocalories (kcal) or joules (J), with one kcal equivalent to approximately 4.184 J. The recommended daily energy intake varies depending on factors such as age, sex, weight, height, physical activity level, and overall health status.
It's important to note that excessive energy intake, particularly when combined with a sedentary lifestyle, can lead to weight gain and an increased risk of chronic diseases such as obesity, type 2 diabetes, and cardiovascular disease. On the other hand, inadequate energy intake can lead to malnutrition, decreased immune function, and other health problems. Therefore, it's essential to maintain a balanced energy intake that meets individual nutritional needs while promoting overall health and well-being.
Caloric reflex test
Videonystagmography
Vestibulo-ocular reflex
Vestibular evoked myogenic potential
Electronystagmography
Cerebellopontine angle syndrome
Brain death
Vertiginous epilepsy
Nystagmus
Anosognosia
Vertigo
Brainstem death
Vestibular rehabilitation
Alp Ikizler
Calor
List of mnemonics
Cow (disambiguation)
Bárány
Hemispatial neglect
Coma
Astronaut
Cranial nerves
Big King
List of MeSH codes (E01)
Bryan Johnson (entrepreneur)
Quantified self
Quantitative insulin sensitivity check index
Life extension
Silver-Russell syndrome
Frederick Madison Allen
Caloric reflex test - Wikipedia
Why Perform Bithermal Caloric Testing? | Interacoustics
Bárány caloric test | Taber's Medical Dictionary
Comparative study between the caloric vestibular and the video-head impulse tests in unilateral Menière's disease
Caloric stimulation and unilateral visual neglect
Migraine-Associated Vertigo: Overview, Epidemiology, IHS Migraine Classification
Caloric test
AIPGMEE ENT Topic 35 caloric test | Incus Quiz Private Limited
Frontiers | Video Head Impulse Test Findings in Patients With Benign Paroxysmal Positional Vertigo Secondary to Idiopathic...
Videonystagmography (VNG): MedlinePlus Medical Test
Overeating, caloric restriction and breast cancer risk by pathologic subtype: the EPIGEICAM study | Scientific Reports
Franca WAGNER | Consultant | PD Dr. med. | Inselspital, Universitätsspital Bern, Bern | University Institute of Diagnostic and...
Correlation between Vestibular Evoked Myogenic Potentials and Disease Progression in Ménière's Disease | ORL | Karger Publishers
Vestibular Autorotation Test (VAT) - Medical Clinical Policy Bulletins | Aetna
NIH Stroke Scale | National Institute of Neurological Disorders and Stroke
Clinical Electrocochleography: Overview of Theories, Techniques and Applications
Claes Möller - Institutionen för hälsovetenskaper - Örebro universitet
Evaluation of Vestibular Function in Patients with Chronic Suppurative Otitis Media | ORL | Karger Publishers
SciELO - Brazil - Hypokalemia during the early phase of refeeding in patients with cancer Hypokalemia during the early phase...
vHIT Helpful in Diagnosing Meniere's Disease
Vestibular dose correlates with dizziness after radiosurgery for the treatment of vestibular schwannoma | Research Square
Part I: Vestibular Dysfunction in Children: Incidence, Diagnoses, Assessment and Intervention - Vestibular Disorders Association
Desmond Nunez - UBC Professor - Faculty Member - Researcher - Supervisor
Therapeutic diets for chronic kidney disease are not necessarily equivalent, or are they? - EveryCat Health Foundation - VIN
Vestibular Function in Children and Adults Before and After Unilateral or Sequential Bilateral Cochlear Implantation -...
Registration Dossier - ECHA
Molecular Vision: Two novel disease-causing mutations in the CLRN1 gene in patients with Usher syndrome type 3
caloric - Liberal Dictionary
Mutations of ESPN cause autosomal recessive deafness and vestibular dysfunction | Journal of Medical Genetics
Vestibulo-ocular4
- In medicine, the caloric reflex test (sometimes termed 'vestibular caloric stimulation') is a test of the vestibulo-ocular reflex that involves irrigating cold or warm water or air into the external auditory canal. (wikipedia.org)
- Traditionally, the caloric test evaluates the vestibulo-ocular reflex (VOR) function of the horizontal SCC using non-physiological stimulus within the frequency range of 0.002-0.004 Hz ( 8 ). (frontiersin.org)
- Assessment was performed using the dizziness handicap inventory (DHI), vestibulo-ocular reflex (VOR) testing using both alternate bithermal caloric irrigations (ENG) and rotational chair-generated sinusoidal harmonic accelerations (SHA), and computerized dynamic platform posturography (CDP) at preoperative, 1-month, 4-month, 1-year and 2-year postimplantation visits. (scienceopen.com)
- After obtaining and reviewing medical records of 21 personnel who consented to the study, the researchers conducted clinical tests of vestibular (dynamic and static balance, vestibulo-ocular reflex testing, caloric testing), oculomotor (measurement of convergence, saccadic, and smooth pursuit eye movements), cognitive (comprehensive neuropsychological battery), and audiometric (pure tone and speech audiometry) functioning. (lww.com)
Effects of caloric restriction2
- Suggested biological mechanisms for the beneficial effects of caloric restriction include decreased circulating levels of growth factors, anabolic hormones, and cytokines. (nature.com)
- This trial tested the effects of caloric restriction - an intervention that has been successful in animal models - over a period of two years. (elifesciences.org)
Intake13
- This study analyzes the association of excessive energy intake and caloric restriction with breast cancer (BC) risk taking into account the individual energy needs of Spanish women. (nature.com)
- Expected caloric intake was predicted from a linear regression model in controls, including calories consumed as dependent variable, basal metabolic rate as an offset and physical activity as explanatory. (nature.com)
- While high energy intake increases BC risk, caloric restriction could be protective. (nature.com)
- A caloric intake assessment, anthropometric measurements and biochemical laboratory tests were performed. (scielo.br)
- Patients on enteral tube feeding had a higher caloric intake compared with those who were fed orally (25±5 kcal/kg/day vs. 10±2 kcal/kg/day). (scielo.br)
- CALERIE, which is sponsored by NIH's National Institute on Aging (NIA), will test the effects of lowering caloric intake for 2 years in a larger number of people. (nih.gov)
- Changes in weight, ad libitum caloric intake and gastric emptying were tested with the paired T-test, the VAS scores with repeated measures ANOVA and all are reported as mean ± SEM. (sages.org)
- People over the age of sixty who reduced their caloric intake by thirty percent improved their score on memory tests by around twenty percent or more! (disabled-world.com)
- If its low then one needs to assess her caloric intake and rule out malabsorption. (ndtv.com)
- When it comes right down to it, losing weight (specifically fat loss) really comes down to decreasing your caloric intake and increasing your exercise. (ultimatefatburner.com)
- Substituting some fruit can really help bring down your total caloric intake for the day. (ultimatefatburner.com)
- These are not revolutionary ways to lower your caloric intake, but they do work. (ultimatefatburner.com)
- An MTL+caloric intake label and the Choices symbol hold promise as FOP labeling systems and require further testing in different environments and population subgroups. (cdc.gov)
Stimulation9
- You mention either cold or warm water alone - please do note that these concepts apply to both water irrigation and air insufflation (the other key method of caloric stimulation). (interacoustics.com)
- You might also note that warm water (or air) stimulation is recommended as a mono-thermal caloric screening stimulus but cold water (or air) might be lead to lower accuracy in predicting the bithermal result (Lightfoot et al. (interacoustics.com)
- We studied performance on tests of visual neglect and left lateral gaze after caloric stimulation in 18 patients with left-sided visual neglect after strokes. (nih.gov)
- Except for one patient with absent vestibulo-ocular responses, all improved during caloric stimulation on the left by cold (LC) or on the right by warm water (RW). (nih.gov)
- During LC and RW caloric stimulation, patients worked from left to right instead of their usual right to left. (nih.gov)
- Caloric stimulation may be of use in training patients with hemispatial neglect to orient toward the affected hemispatial field. (nih.gov)
- As far as caloric testing is concerned, whatever method is used: convection current, the thermal gradient between the two ends of the canal, direct stimulation of the sensory cells, it does not hamper, in situations where @ the response is a left-beating nystagmus. (vestib.org)
- Conversely, again and again caloric stimulation makes the "straight ahead" reference lean towards the right-hand-side of the head. (vestib.org)
- Caloric stimulation is a test that uses differences in temperature to diagnose damage to the acoustic nerve. (limamemorial.org)
Vestibular evoked myogenic2
- To examine the pathophysiological features of patients with vestibular impairments associated with SSNHL, many instrumental vestibular evaluations, such as caloric test and vestibular evoked myogenic potentials (VEMPs), have been explored ( 6 , 7 ). (frontiersin.org)
- The caloric test, vestibular evoked myogenic potential (VEMP) test, video head impulse test (vHIT), Dizziness Handicap Inventory (DHI), Pediatric Vestibular Symptom Questionnaire (PVSQ), and audiometric tests were performed before and 1 month after CI. (scienceopen.com)
Nystagmus5
- Well your question already encapsulates one of the key reasons why one might need to perform all four irrigations (binaural & bithermal) i.e. that while mono-thermal screening reduces test time and predicts the bithermal result with high sensitivity and specificity but with certain criteria attached (e.g. the absence of spontaneous nystagmus and overall response size above a certain threshold). (interacoustics.com)
- If the caloric test shows us the compensation of the RVO with the disappearance of the spontaneous nystagmus and directional preponderance, it enables us to see if and how the healthy labyrinth compensates the deficit of the unhealthy one. (vestib.org)
- The head autorotation tests were performed just before the use of the Epley maneuver and after the resolution of symptoms and the typical nystagmus pattern. (aetna.com)
- Most had spontaneous nystagmus and 86.7% had an abnormal bithermal caloric test. (biomedcentral.com)
- Significant findings were a severe spontaneous and constant true-whirling vertigo which worsened with head movement, horizontal-torsional spontaneous nystagmus, abnormal caloric test, positive bedside head impulse tests, and inability to tolerate head-thrust test. (springer.com)
Abnormal4
- In 2014, Bidow et al demonstrated that only one in three MD patients with significant caloric asymmetry had an abnormal vHIT. (hearinghealthmatters.org)
- A more recent study by Hannigan et al (2019) found normal vHIT with abnormal caloric test results in roughly 36% of patients diagnosed with MD. This pattern was noted in less than 2% of patients in the non-MD group. (hearinghealthmatters.org)
- The abnormal rates of caloric test and VEMP test after CI in the first-side CI-implanted adults and children significantly increased compared with those before CI. (scienceopen.com)
- The pre-implantation VEMP test showed significantly higher abnormal rates between first- and second-side CI-implanted children. (scienceopen.com)
Bithermal2
- Why Perform Bithermal Caloric Testing? (interacoustics.com)
- For caloric testing , I am just thinking if we can do cold or warm water alone, why we need to do bithermal beside the benefit of better averaging. (interacoustics.com)
Electronystagmography3
- Calorics are usually a subtest of the electronystagmography (ENG) battery of tests. (wikipedia.org)
- Affected members (ages 14, 16, and 39) of family PKSN32 denied vestibular symptoms although caloric testing with electronystagmography (ENG) revealed vestibular areflexia. (bmj.com)
- Electronystagmography is a test that looks at eye movements to see how well nerves in the brain are working. (limamemorial.org)
Restriction3
- Overeating and caloric restriction were defined taking into account the 99% confidence interval of the predicted value. (nature.com)
- Moderate caloric restriction, in combination with regular physical activity, could be a good strategy for BC prevention. (nature.com)
- According to the International Agency for Research on Cancer, there is sufficient evidence from experimental animal studies indicating that limiting body-weight gain by caloric restriction has a preventive effect on cancer of the mammary gland 3 . (nature.com)
VHIT7
- Leigh has presented at numerous scientific conferences and meetings across a diverse range of audiological topics as well as having published papers in both video head impulse testing (vHIT) and wideband tympanometry. (interacoustics.com)
- Compare the caloric vestibular test (CVT) and the video head impulse test (vHIT) in the evaluation of Meniere's disease (MD) and to analyze their diagnostic accuracy. (cun.es)
- Our purpose was to explore the pathophysiological mechanism and investigate the clinical implications of video head impulse test (vHIT) in these patients. (frontiersin.org)
- As a newly developed test, the video head impulse test (vHIT) assesses the angular VOR function of six SCCs within the physiological frequency range (5-7 Hz) ( 9 ). (frontiersin.org)
- We have noticed over the past few years that most MD patients, despite having a significant caloric weakness, typically have normal vHIT tests. (hearinghealthmatters.org)
- In this situation, vHIT served as a complimentary test to caloric irrigation, not a substitute. (hearinghealthmatters.org)
- CI has a negative effect on the results of caloric and VEMP tests, but not on vHIT, indicating that the otolith and low-frequency semicircular canal (SCC) are more vulnerable to damage from CI. (scienceopen.com)
Asymmetry1
- Caloric asymmetry was found in 64.7% of MD patients. (karger.com)
Weakness1
- Computerized VNG or ENG caloric testing quantifies the strength of response of the vestibular system to cool and warm irrigations in each ear, enabling the physician to discriminate unilateral weakness. (msdmanuals.com)
Movements3
- Only horizontal eye movements will be tested. (nih.gov)
- Voluntary or reflexive (oculocephalic) eye movements will be scored, but caloric testing is not done. (nih.gov)
- Patients with ocular trauma, bandages, pre-existing blindness, or other disorder of visual acuity or fields should be tested with reflexive movements, and a choice made by the investigator. (nih.gov)
Unilateral1
- This type of testing does not appear useful in detecting unilateral vestibular loss (e.g., as a consequence of unilateral acoustic neuroma, Meniere's disease or vestibular neuritis). (aetna.com)
Patients9
- In this study, 20 patients who had been diagnosed as having posterior semicircular canal BPPV were evaluated with head autorotation tests before and after Epley maneuver. (aetna.com)
- All patients were also evaluated with vertical active tests. (aetna.com)
- Patients with improved caloric function had received significantly lower mean (1.5 ± 0.7 Gy, p=0.01) and maximum doses (4 ± 1.5 Gy, p =0.01) to the vestibule. (researchsquare.com)
- Additionally, mean and maximum doses received by the vestibule were significantly lower in patients who had improved caloric function. (researchsquare.com)
- Vestibular clinicians are opening their practices to evaluate, test or treat patients with dizziness and balance problems. (audiology.org)
- Twenty randomly selected asymptomatic blood donors, 48 symptomatic blood donors (30 FD, 18 IBS), and 40 patients (23 FD, 17 IBS) had additional function testing. (bmj.com)
- Patients with ocular trauma, bandages, pre-existing blindness or other 2 = Forced deviation, or total gaze paresis not overcome by the disorder of visual acuity or fields should be tested with reflexive oculocephalic maneuver. (medscape.com)
- NHS Shropshire Audiology provide specialist Vestibular Testing for patients referred by an Ear, Nose & Throat Consultant. (sath.nhs.uk)
- Before and one month after the procedure patients came for a standardized test meal with breath sampling for gastric emptying (13C octoanoic acid breath test) and visual analogue scale (VAS) for hunger and satiety. (sages.org)
Calories3
- Cats consumed 23% less calories when fed the control diet compared to cats fed the test diet. (vin.com)
- In a long-distance triathlon, therefore, you will always to run a caloric deficit - or burn more calories than you can ingest. (trainingpeaks.com)
- Control Groups A and B received diets with the same amount of calories consumed by Test Groups A and B, respectively, with ethanol replaced by isocaloric amounts of carbohydrate. (bvsalud.org)
Audiometry2
- Audiometry and position- al and caloric nystagmography results were unremarkable. (cdc.gov)
- An audiometry exam tests your ability to hear sounds. (limamemorial.org)
Nutrient2
- Gastric emptying time (GET (t 1/2 , min)) was measured by 13 C-octanoic breath test and a nutrient challenge performed. (bmj.com)
- Participants' diets were standardized based on daily caloric requirements and identical in nutrient content. (medscape.com)
Migraine-associated1
- Subjects with migraine-associated vertigo scored lower on cognitive tests than did those with simple migraine, while magnetic resonance imaging (MRI) demonstrated a greater incidence of deep brain, peripheral lateral ventricle, and total white matter lesions in the migraine-associated vertigo group than in the other. (medscape.com)
Audiologist1
- An ENT Consultant will be able to make a referral to an Audiologist who can carry out a hearing test and discuss what types of hearing aids may be beneficial. (sath.nhs.uk)
Ocular1
- Ocular testing. (medlineplus.gov)
Responses1
- Caloric responses may be decreased or increased relative to the healthy ear depending on how recently the patient had an episode. (hearinghealthmatters.org)
Results2
- CI was carried out without respect to the preoperative vestibular function test results. (scienceopen.com)
- The questionnaire results were contrasted with the average of the two 24- hour recall using the chi-square test. (bvsalud.org)
Conclusion2
- Our conclusion was that this test pattern most likely represented atypical MD on the right. (hearinghealthmatters.org)
- In conclusion, this study suggests that therapeutic renal foods with good palatability, increased caloric density and enhanced concentrations of essential amino acids and L-carnitine may help cats with CKD maintain body weight and lean body mass. (vin.com)
Symptoms4
- Because testing often fails to produce a firm diagnosis, the criteria developed by consensus opinion through the Barany Society for "Definite Meniere's disease" is largely based on symptoms . (hearinghealthmatters.org)
- Children complaining of vestibular related symptoms, or children with diagnoses related to vestibular dysfunction should be tested so that the proper interventions can be initiated. (vestibular.org)
- The differences and changes in signs and symptoms can complicate the identification of children for whom comprehensive testing is warranted. (vestibular.org)
- Tests can rule out other causes of your symptoms. (limamemorial.org)
Meal1
- a caloric meal. (tekportal.net)
Assessment1
- In an assessment on vestibular testing techniques in adults and children, the American Academy of Neurology (Fife et al, 2000) stated that AHR testing is not an established technique. (aetna.com)
Limits1
- By dialing in your Ironman nutrition protocol, you can test caloric ingestion limits as well as observe your energy availability and muscular ability when running off the bike. (trainingpeaks.com)
Differences1
- For the group as a whole, pair wise comparisons revealed few significant differences between preoperative and postoperative values for VOR testing (ENG and SHA) at any of the follow-up intervals. (scienceopen.com)
Vertigo1
- Ozgirgin and Tarhan (2008) noted that the head autorotation tests can be affected with the dynamic changes within the semicircular canals caused by benign paroxysmal positional vertigo (BPPV). (aetna.com)
Head4
- The vestibular autorotation test (VAT) is a high-frequency, active head rotation (AHR) test to subjectively evaluate the VOR and its function. (aetna.com)
- Furthermore, a recent study (Tirelli et al, 2004) reported that the test-retest of the Vorteq system, a head-autorotation test is not sufficiently reliable and hence can not be used in clinical practice. (aetna.com)
- A head MRI (magnetic resonance imaging) is an imaging test that uses powerful magnets and radio waves to create pictures of the brain and surrounding. (limamemorial.org)
- Different components of the vestibular system can be tested by varying head and body position or by presenting visual stimuli. (msdmanuals.com)
Evaluate2
- Aim: To evaluate histometrically the effect of low and high caloric value of ethanol on ligatureinduced bone loss in female rats. (bvsalud.org)
- Considering that more studies are necessary to test the hypothesis that alcohol consumption can aggravate destruction of the periodontium, the aim of this study was to evaluate histometrically the effect of low and high caloric values of ethanol consumption on alveolar bone loss associated with ligature-induced bone loss in female rats. (bvsalud.org)
Significantly lower1
- Mean body weights of male rats fed 10,000 ppm and of females fed 10,000 and 3000 ppm test substance were significantly lower than control throughout the 13 week feeding study. (europa.eu)
Found1
- 0.041) were found along with consistently higher levels of focus accompanied by less fatigue when MPP was consumed in comparison to comparator during upper body muscular strength-endurance tests at weeks 3 and 6. (medsci.org)
Diets1
- Control and test diets met AAFCO minimum recommendations for adult maintenance. (vin.com)
Hypothesis1
- Definitive tests of the hypothesis must demonstrate reduced rates of age-related diseases and death, but the length of time and size of trial needed to test the hypothesis are both substantial. (elifesciences.org)
Water4
- To test a dish or cookware for safe use inside your microwave , put it into the oven with a cup of water beside it. (searspartsdirect.com)
- You will be tested again with warm water or air in the same ear. (medlineplus.gov)
- Thus, analytical testing in the food and beverage industry also extends to environmental testing (e.g., soil and water quality, air monitoring). (sigmaaldrich.com)
- Methods: Sixty female rats were divided into five groups of 12 animals each: Normal Control (water), Test A (low ethanol), Control A (low iso), Test B (high ethanol) and Control B (high iso). (bvsalud.org)
Lower1
- Visual fields (upper and lower quadrants) are tested by confrontation, using finger counting or visual threat, as appropriate. (nih.gov)
Lean2
- Cats with IRIS stage 1 and 2 chronic kidney disease maintain body weight and lean muscle mass when fed food having increased caloric density, and enhanced concentrations of carnitine and essential amino acids. (vin.com)
- Cats consuming control food had a significant loss of mean body weight (-13%) and a significant reduction in lean body mass (-11.1%) during the 6-month feeding period, whereas cats consuming test food had a significant increase in mean body weight (+5.8%) and no change in lean body mass during the 6-month feeding period. (vin.com)
Significant2
- Likewise, DHI testing was also unchanged except for significant reductions (improvements) in the emotional subcategory scores at both the 4-month and 1-year intervals. (scienceopen.com)
- Haematological alterations observed in 3000 ppm males and in both sexes fed 10,000 ppm test substance were significant increases in total leukocytes and in absolute lymphocyte values. (europa.eu)
Food6
- In addition, test food was enhanced with essential amino acids, L-carnitine, and palatability. (vin.com)
- the caloric content of food. (tekportal.net)
- Analytical and instrumental methods for food and beverage analysis and quality control are implemented to test for safety, quality, and nutritional value. (sigmaaldrich.com)
- Testing for heavy metals in food and beverages? (sigmaaldrich.com)
- Fortunately, increasingly sensitive tests are in place to ensure our food is safe. (sigmaaldrich.com)
- No need to look up every single food you've ever eaten, but you should get an idea of the caloric values of the foods you eat regularly. (ultimatefatburner.com)
Chair2
- It is generally written that kinetic testing on a rotatory chair checks both labyrinths at the same time while caloric testing checks them separately. (vestib.org)
- In addition, consider relying more on rotary chair evaluation (if you have this available) rather than caloric testing. (audiology.org)
Total1
- Another study demonstrated that in male rats, ethanol increases ligature-induced bone loss when representing a low value (22%) in total caloric value 13 . (bvsalud.org)
Content1
- thus, the reason for increasing L-carnitine content in test diet. (vin.com)
Function1
- The test is commonly used by physicians, audiologists and other trained professionals to validate a diagnosis of asymmetric function in the peripheral vestibular system. (wikipedia.org)
Clinical2
- This Clinical Policy Bulletin addresses vestibular autorotation test (VAT). (aetna.com)
- Aetna considers vestibular autorotation test (VAT) experimental and investigational for the diagnosis of individuals with vestibular disorders, vestibular migraine, or any other indications because its sensitivity, specificity, reproducibility, and clinical utility have not been demonstrated. (aetna.com)
Goggles1
- During a VNG test, you'll sit in a dark room wearing special goggles. (medlineplus.gov)
Study1
- Our web-based study tested consumer understanding of different FOP labeling systems. (cdc.gov)
Considerations1
- However, we believe that certain considerations should be taken into account with this test. (vestib.org)
Control4
- Videonystagmography (VNG) is a test that measures a type of eye movement that you can't control. (medlineplus.gov)
- Royal Canin Renal Support A Feline dry was referred to as the control diet and Hill's Prescription diet k/d Feline with chicken dry was referred to as the test diet. (vin.com)
- Test diet also had increased caloric density compared to control diet. (vin.com)
- Posturography uses computerized test equipment to quantitatively assess the patient's control of posture and balance. (msdmanuals.com)
Time2
- For this part of the VNG, your ears will be tested one at a time. (medlineplus.gov)
- Some people have nausea for a short time during caloric testing, but vomiting is uncommon. (medlineplus.gov)
Method1
- Analytical method and sample preparation for Spectroquant® Sulfite Test. (sigmaaldrich.com)
Interventions1
- Reliable biomarkers are needed to test the effectiveness of interventions intended to improve health and extend lifespan. (elifesciences.org)
Nervous system1
- You may also have tests of your nervous system (neurological exam). (limamemorial.org)
Horizontal2
Patient1
- Vestibular testing presents a higher risk of transmission due to proximity to the patient and the risk of emesis. (audiology.org)
Balance problems1
- The four deaf individuals in family PKSR5A reported balance problems, and caloric-ENG testing confirmed vestibular areflexia. (bmj.com)