Caloric Tests: Elicitation of a rotatory nystagmus by stimulating the semicircular canals with water or air which is above or below body temperature. In warm caloric stimulation a rotatory nystagmus is developed toward the side of the stimulated ear; in cold, away from the stimulated side. Absence of nystagmus indicates the labyrinth is not functioning.Electronystagmography: Recording of nystagmus based on changes in the electrical field surrounding the eye produced by the difference in potential between the cornea and the retina.Nystagmus, Physiologic: Involuntary rhythmical movements of the eyes in the normal person. These can be naturally occurring as in end-position (end-point, end-stage, or deviational) nystagmus or induced by the optokinetic drum (NYSTAGMUS, OPTOKINETIC), caloric test, or a rotating chair.Otologic Surgical Procedures: Surgery performed on the external, middle, or internal ear.Mastoid: The posterior part of the temporal bone. It is a projection of the petrous bone.Vertigo: 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)Vestibular Diseases: 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.Caloric Restriction: Reduction in caloric intake without reduction in adequate nutrition. In experimental animals, caloric restriction has been shown to extend lifespan and enhance other physiological variables.Air: The mixture of gases present in the earth's atmosphere consisting of oxygen, nitrogen, carbon dioxide, and small amounts of other gases.Energy Intake: Total number of calories taken in daily whether ingested or by parenteral routes.

*  Patent US4299237 - Closed flow caloric test device - Google Patents

... and the receptacle may be constructed to provide a test fluid internal flowpath and a vent flowpath for air trapped between the ... Apparatus for transferring thermal energy from a calorized fluid to an ear canal and tympanic membrane for carrying out caloric ... Air has also been used as a caloric test fluid but often causes undue patient discomfort; furthermore, variability of test ... In performing a caloric nystagmus test with probe 10, calorized inlet fluid at the desired temperature is caused to flow into ...
google.com/patents/US4299237?dq=6,666,377

*  Patente US6334064 - Remote sensing tonometric catheter apparatus and method - Google Patentes

Methods and materials for calibrating a caloric test. US9610227 *. 27 Mar 2016. 4 Abr 2017. Art Healthcare Ltd.. Interactive ... Methods and materials for calibrating a caloric test. US20140276170 *. 14 Mar 2014. 18 Sep 2014. Airway Control Technologies, ... Hence the output voltage signal on lead 164 is likewise an indication of the pCO2 level of the organ under test. This voltage ... Ear probe for use in closed-loop caloric irrigation. US4259960. 15 Oct 1979. 7 Abr 1981. The Kendall Company. Catheter with non ...
google.es/patents/US6334064

*  ARTICLES | Journal of Neurophysiology

1990) Age-related changes in human vestibulo-ocular reflexes: sinusoidal rotation and caloric tests. J Vestib Res 1:49-59. ... Phase lags of as much as −400° were seen at the highest frequency (2.23 Hz) on some tests (Fig. 5 A), but on other tests, the ... Of the 240 tests performed by the eight normal subjects, only about 20 tests showed resonant behavior qualitatively similar to ... This subject's high stiffness strategy was evident in all test conditions.. In the test condition with visual stimulation on a ...
jn.physiology.org/content/88/3/1097.long

*  Flashcards - Ear/EENT

DX with caloric test*rinne and webber tuning*xrays and CT scan*glycerol test*tx *IV valium*meclizine helps with whirling ...
https://freezingblue.com/flashcards/print_preview.cgi?cardsetID=219270

*  Rehab Nursing CRRN Review ch. 9 by Kassie clary on Prezi

Oculovestibular reflex (Caloric test)-water placed in ear canal, eyes do not deviate toward stimulus. Pontine lesions produce a ...
https://prezi.com/ep0ac9knay9s/rehab-nursing-crrn-review-ch-9/

*  Ear ventilation tubes

... make it impossible to perform certain diagnostic ear tests. These include:. *Water caloric tests -- an important part of the ... ECochG -- a test for Meniere's disease (This test involves putting something in the ear canal, and it should not be done in a ...
dizziness-and-balance.com/treatment/tube.html

*  Vestibular suppression

Evaluation of the function was carried out by using unilateral caloric test in different arousal status. The goal of this ... A test request method was proposed as the best way to fix attention of subjects. ...
cun.es/en/research/scientific-publications/vestibular-suppression

*  Attorneys for Aetna Disability Claims

Since having this VNG/caloric test it has been proven that I have this problem. This is now objective/positive proven results ... So many tests have been done to test my cognitive performance and I failed all of them. Until now, I am receiving %60 of my ... caloric testing. The test results showed that I have a vestibular labyrinthine loss on my left side only (unilateral). Up to ... I was taken out of work and was subjected to so many test's to figure out what was going on. They thought it was my heart, my ...
diattorney.com/aetna/

*  The AMEDEO Literature Guide

Value of pre-operative caloric test in predicting speech perception after cochlear implantation in adults with post-lingual ... Comparative study between the caloric vestibular and the video-head impulse tests in unilateral Meniere's disease.. Acta ... Determination of the time course of caloric nystagmus in patients with spinocerebellar degeneration using caloric step stimulus ... Is dehydration test using isosorbide useful in Meniere's disease?. Acta Otolaryngol. 2016.. PubMed Text format Abstract ...
amedeo.com/medicine/orl/actaolar.htm

*  Balance Testing in Melrose Park, IL

4. Caloric Test:. Your doctor will stimulate both of your inner ears with warm and then cold water. He or she will be ... Nystagmography Tests:. This is a series of tests designed to determine your ability to follow visual objects with your eyes and ... Audiometric (Hearing) Tests:. Your doctor may order hearing tests as the hearing and motion sensing parts of your inner ears ... Once tests have been conducted, your physician will review the test results and consider them along with your symptoms and ...
https://northparkmed.com/internal-medicine/balance-testing/

*  Coding for Vestibular Tests : CONTINUUM: Lifelong Learning in Neurology

CPT code 92543 is a test of caloric irrigation (air or water) and may be billed for each caloric test performed. Most ENG/VNG ... 92543 Caloric vestibular test, each irrigation (binaural, bithermal stimulation constitutes 4 tests), with recording Global RVU ... Although not strictly a vestibular test, it is often performed in conjunction with vestibular tests to clarify the degree and ... positional nystagmus test, minimum of 4 positions, with recording, optokinetic nystagmus test, bidirectional and foveal and ...
journals.lww.com/continuum/Fulltext/2012/10000/Coding_for_Vestibular_Tests.17.aspx

*  Aural nystagmus | definition of aural nystagmus by Medical dictionary

caloric nystagmus rotatory nystagmus in response to caloric stimuli in the ear, seen during the caloric test. ...
medical-dictionary.thefreedictionary.com/aural nystagmus

*  Dynamometric Car | definition of Dynamometric Car by Medical dictionary

Block sorting test, Breath test, But for test, C-peptide suppression test, Calcitonin suppression test, Caloric test, Cancer ... Draw-a-person test, d-xylose absorption test, EDAC test, ELM test, Esoteric test, Exercise test, F test, F-max test, Fagan test ... Sickle cell test, Simple test, Sims-Huhner test, Sink-or-float test, SISI test, Skin test, 'Sort of' test, Special test, Spot ... Viral load test, Vitamin K test, Vocabulary test, Voges-Proskauer test, Volhard's test, Wada test, Waived test, Washout test, ...
medical-dictionary.thefreedictionary.com/Dynamometric Car

*  Chinese Medical Journal : Table of Contents

Each patient received a caloric test, vestibular-evoked myogenic potential (VEMP) test, and cochlear nerve function test ( ... Comparing with the nerve of origins (SVN and IVN) of tumors, the results of the caloric tests and VEMP tests were significantly ... Conclusions: Our data suggest that caloric and VEMP tests might help to identify whether VS tumors originate from the SVN or ... A Chi-square test was used to test for genotype/allele frequencies variants. Results: Among the four SNPs, rs10919543 was found ...
cmj.org/showBackIssue.asp?issn=0366-6999

*  References related to ototoxicity

... yield of the eng caloric test in detecting bilateral vestibular loss in the dizzy patient? Laryngoscope 2001 Jun;111(6):959-63 ... They report increased gain at high frequences in elderly (mean 82) day hospital patients, using the autorotation test. COMMENT ...
dizziness-and-balance.com/disorders/bilat/Bilat_recent.html

*  Volume 47, Number 1, 2015 | Journal of Alzheimer's Disease

Vestibular function was assessed using a stepping test, caloric nystagmus, and a visual suppression (VS) test. Results: The ... The velocity of the rapid phase of caloric nystagmus before the VS test was similar in the AD group and the elderly control ... Tests included Logical Memory, Visual Reproduction, Paired Associate, Hooper Visual Organization Test, Trail Making A & B, ... The VS test is useful for assessing the tendency to fall in AD. Impairment of VS in AD might arise from cerebral vestibular ...
j-alz.com/vol47-1

*  Journal of Vestibular Research - Volume 9, issue 2 - Journals - IOS Press

Keywords: peripheral vestibular deficit, vestibulo-ocular reflex, caloric tests, rotation tests, electronystagmography, neural ... The gain measured with both tests was close to unity (range 0.95--1.04) from 1 to 4 Hz and about 0.9 at 5 Hz. In the test ... However, the correlation coefficient between rotation and caloric responses was always less than 0.6. Unlike caloric responses ... circ that was measured by the other test. The asymmetry measured with the Vorteq test increased continuously from 1.5% ...
content.iospress.com/journals/journal-of-vestibular-research/9/2

*  Plus it

Comparison of satiety test methods. The two water-based methods are significantly correlated, whereas the caloric drink test is ... WL51, first drink test; WL52, second drink test; WL53, third drink test. Dashed lines represent the 95% confidence intervals ... including caloric composition, osmolarity, and palatability of the test meal. Although in certain situations the use of caloric ... 3), however, recently showed that a drink test using either water or a caloric drink was a less sensitive predictor of impaired ...
ajpgi.physiology.org/content/284/6/G896

*  New study provides more evidence caloric restriction slows aging - Business Insider

... ways of reproducing the effects of caloric restriction; some even want to test some form of caloric restriction on people. ... Significant caloric restriction - cutting caloric intake by about 30% - is at this point the anti-aging intervention that ... It'd be hard to safely run a study asking an aging human population to cut their caloric intake by 30%, Dr. Leonard Guarente, ... And these could contradict any of the good anti-aging properties of caloric restriction. For these and the practical reasons ...
businessinsider.com/evidence-caloric-restriction-slows-aging-process-2016-8?r=UK&IR=T

*  Consensual pupillary reflex | definition of Consensual pupillary reflex by Medical dictionary

... the eyes in response to stimulation of the vestibular system by angular acceleration or deceleration or when the caloric test ...
https://medical-dictionary.thefreedictionary.com/Consensual pupillary reflex

*  Nystagmus, Pathologic; Convergence Nystagmus; Horizontal Nystagmus; Jerk Nystagmus; Pendular Nystagmus; Periodic Alternating...

NystagmusCaloric reflex testOscillopsia. More information. Reported cases - Summary of cases reported on this diseaseRelated ...
lookfordiagnosis.com/mesh_info.php?term=Nystagmus, Pathologic&lang=1

*  Electronystagmography (ENG)

... is a test used to evaluate vertigo and certain other hearing and vision disorders. Vertigo is a false sense of spinning or ... Water caloric test. This test involves introducing warm or cool water into the ear canal with a syringe so that it touches the ... Calibration test. For this test, you follow a light with your eyes. This test checks for ocular dysmetria, a condition that ... The water caloric test may cause mild discomfort. If you have been previously diagnosed with a perforated tympanic membrane, ...
austinregionalclinic.staywellsolutionsonline.com/Library/TestsProcedures/Neurological/92,P07659

*  Is Clonazepam Making My Hyperacusis and Tinnitus Worse? | Tinnitus Talk Support Forum

The ENT I saw was useless but I do plan on finding another one as I would like to have that caloric test? done to rule out ...
https://tinnitustalk.com/threads/is-clonazepam-making-my-hyperacusis-and-tinnitus-worse.6960/

*  ENG testing in persons with strabismus

ENG results depend greatly on whether or not one is allowing vision (e.g. the oculomotor tests), or not (e.g. the caloric/ ... In the dark, such as when doing the caloric or positional testing, the main consideration is simply whether or not the eyes are ...
dizziness-and-balance.com/testing/ENG/eng-strabismus.htm

*  Recovery of Visual Acuity in People With Vestibular Deficits - Full Text View - ClinicalTrials.gov

... difference in slow phase eye velocity between right and left sides on either the caloric or rotary chair test. Bilateral ... performance test. *Eye Movements: Scleral Search Coil [ Time Frame: pre- and post-treatment ]. eye movements are measured by ... Herdman SJ, Tusa RJ, Blatt P, Suzuki A, Venuto PJ, Roberts D. Computerized dynamic visual acuity test in the assessment of ... 1 on rotary chair step test and a peak slow phase eye movement of ,5 degrees/sec during irrigation of each ear on bithermal ...
https://clinicaltrials.gov/ct2/show/NCT00411216?cond="Acoustic neuroma"&rank=10

ElectronystagmographyAlexander's law: Jacobson GP et al. Alexander's law revisited.Translabyrinthine approach: The translabyrinthine approach is a surgical approach to the cerebellopontine angle, or CPA. It is used in the surgical extirpation of lesions of the cerebellopontine angle, including acoustic neuroma.ICD-10 Chapter VIII: Diseases of the ear and mastoid process: == H60–H99 – Diseases of the ear and mastoid process ==Vertigo (Marvel Comics): Vertigo is a native of the Savage Land who obtained superhuman powers at a young age by genetic engineering. Her powers enable her to render a person severely dizzy and even unconscious.Dog healthCALERIE: CALERIE (Comprehensive Assessment of Long-term Effects of Reducing Intake of Energy) is a trial currently underway in the U.S.Air sensitivity: Air sensitivity is a term used, particularly in chemistry, to denote the reactivity of chemical compounds with some constituent of air. Most often, reactions occur with atmospheric oxygen (O2) or water vapor (H2O),Handling and Storage of Air-Sensitive Reagents, Technical Bulletin AL-134, Sigma-Aldrich although reactions with the other constituents of air such as carbon monoxide (CO), carbon dioxide (CO2), and nitrogen (N2) are also possible.List of countries by food energy intake: Food consumption refers to the amount of food available for human consumption as estimated by the FAO Food Balance Sheets. However the actual food consumption may be lower than the quantity shown as food availability depending on the magnitude of wastage and losses of food in the household, e.

(1/58) Caloric value of inulin and oligofructose.

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)

(2/58) Cerebral representations for egocentric space: Functional-anatomical evidence from caloric vestibular stimulation and neck vibration.

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)

(3/58) Neurotoxic mechanism of cinnabar and mercuric sulfide on the vestibulo-ocular reflex system of guinea pigs.

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)

(4/58) A new light on caloric test--what was disclosed by three dimensional analysis of caloric nystagmus?

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)

(5/58) Perspectives for the comprehensive examination of semicircular canal and otolith function.

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)

(6/58) Dominance for vestibular cortical function in the non-dominant hemisphere.

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)

(7/58) Treatment of anterior canal benign paroxysmal positional vertigo by a prolonged forced position procedure.

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)

(8/58) Methylprednisolone, valacyclovir, or the combination for vestibular neuritis.

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)



nystagmus


  • Determination of the time course of caloric nystagmus in patients with spinocerebellar degeneration using caloric step stimulus procedure. (amedeo.com)

vestibular


  • This is a series of tests designed to determine your ability to follow visual objects with your eyes and how your eyes respond to some types of information from your vestibular system. (northparkmed.com)

significant


  • Significant caloric restriction - cutting caloric intake by about 30% - is at this point the anti-aging intervention that researchers think might actually stave off the physical processes that make cells slower to heal, opening up the brain and body to disease. (businessinsider.com)

patients


  • Eye movement tests are useful, because some patients with balance system problems have problems seeing clearly when moving, or they get the inaccurate sense that objects are moving. (northparkmed.com)
  • They report increased gain at high frequences in elderly (mean 82) day hospital patients, using the autorotation test. (dizziness-and-balance.com)
  • The present study was undertaken to further evaluate the performance characteristics of the drink test in both healthy controls and patients with FD. (physiology.org)

step


  • The indirect antiglobulin test detects serum antibodies that bind to red cells in an in vitro incubation step. (thefreedictionary.com)

form


sensation


  • The water load or drink test is such a tool that was developed as a noninvasive method to assess gastric sensation. (physiology.org)
  • It thus appears that, although the results of drink tests are due at least in part to gastric sensation and motor function, the test may also be influenced by sensory and psychological factors. (physiology.org)

course


  • On the other hand, if your symptoms and exam results are suggestive of a specific cause, your doctor may order tests designed to confirm a diagnosis and suggest the best course of treatment. (northparkmed.com)

inner ear


  • Recent studies have documented that balance tests are more accurate than clinical examination in identifying inner ear disorder. (northparkmed.com)

clinical


  • automated reagin test (ART) a modification of the rapid plasma reagin (RPR) test for use with automated analyzers used in clinical chemistry. (thefreedictionary.com)

provide


  • The receptacle is provided with an inlet and outlet for pressurized testing fluid, and the receptacle may be constructed to provide a test fluid internal flowpath and a vent flowpath for air trapped between the receptacle and the tympanic membrane. (google.com)
  • The drink test is noninvasive and may provide similar information. (physiology.org)

designed to determine


  • Basic hearing tests are designed to determine how well you can sense very faint sound at different frequencies, as well as how well you can comprehend speech. (northparkmed.com)
  • aptitude tests tests designed to determine ability to undertake study or training in a particular field. (thefreedictionary.com)

study


  • A new study on mice published August 24 in the journal Nature adds even more evidence supporting the potential anti-aging effect of caloric restriction and showing precisely how it happens in those animals. (businessinsider.com)
  • It'd be hard to safely run a study asking an aging human population to cut their caloric intake by 30%, Dr. Leonard Guarente , the Novartis Professor of Biology at the Glenn Laboratory for the Science of Aging at MIT, told Business Insider. (businessinsider.com)

movement


  • In order to test your eye movement control, you may be asked to shift your direction of gaze from one object to another as quickly as you can. (northparkmed.com)

function


  • Evaluation of the function was carried out by using unilateral caloric test in different arousal status. (cun.es)

disease


  • Your doctor may order hearing tests as the hearing and motion sensing parts of your inner ears are sometimes both affected by the same disease. (northparkmed.com)
  • It's well established that caloric restriction can extend life and prevent disease in animals, with studies conducted in species ranging from yeast and mice to dogs and monkeys . (businessinsider.com)

point


  • If balance problems are detected, further tests would be warranted to pin point your risk factors and accurately identify their causes. (northparkmed.com)

specific


  • There are specific observational tests that can help your doctor figure out what is causing your balance problems. (northparkmed.com)
  • For names of specific tests, see under the name. (thefreedictionary.com)

head


  • To test eye and head coordination, your physician may observe how accurately you can stay focused on an object while shaking your head. (northparkmed.com)

method


  • A test request method was proposed as the best way to fix attention of subjects. (cun.es)
  • alkali denaturation test a spectrophotometric method for determining the concentration of fetal (F) hemoglobin. (thefreedictionary.com)

studies


  • The test is easily performed and well tolerated, and preliminary studies have demonstrated reproducibility in healthy adults ( 11 , 15 , 34 ). (physiology.org)
  • Initial studies of the drink test suggested that it correlated well with barostat studies ( 1 ). (physiology.org)