Indication of the Side of Delayed Endolymphatic Hydrops by Vestibular Evoked Myogenic Potential and Caloric Test

ORL ◽  
2010 ◽  
Vol 72 (5) ◽  
pp. 242-246 ◽  
Author(s):  
Naoya Egami ◽  
Munetaka Ushio ◽  
Tatsuya Yamasoba ◽  
Toshihisa Murofushi ◽  
Shinichi Iwasaki
Keyword(s):  
Endolymphatic Hydrops ◽  
Caloric Test ◽  
Vestibular Evoked Myogenic Potential ◽  
Myogenic Potential ◽  
Delayed Endolymphatic Hydrops

Revision of a furosemide-loading vestibular-evoked myogenic potential protocol for detecting endolymphatic hydrops

2017 ◽  
Vol 137 (12) ◽  
pp. 1244-1248 ◽  
Author(s):  
Toru Seo ◽  
Ko Shiraishi ◽  
Takaaki Kobayashi ◽  
Kitano Mutsukazu ◽  
Takeshi Fujita ◽  
...  
Keyword(s):  
Endolymphatic Hydrops ◽  
Vestibular Evoked Myogenic Potential ◽  
Myogenic Potential

Three Cases of Cochleosaccular Endolymphatic Hydrops without Vertigo Revealed by Furosemide-Loading Vestibular Evoked Myogenic Potential Test

2003 ◽  
Vol 24 (5) ◽  
pp. 807-811 ◽  
Author(s):  
Toru Seo ◽  
Michiko Node ◽  
Atsushi Miyamoto ◽  
Akiko Yukimasa ◽  
Tomonori Terada ◽  
...  
Keyword(s):  
Endolymphatic Hydrops ◽  
Vestibular Evoked Myogenic Potential ◽  
Myogenic Potential ◽  
Potential Test

Prognosis of patients with idiopathic sudden hearing loss: role of vestibular assessment

2010 ◽  
Vol 125 (3) ◽  
pp. 251-257 ◽  
Author(s):  
S Korres ◽  
G A Stamatiou ◽  
E Gkoritsa ◽  
M Riga ◽  
J Xenelis
Keyword(s):  
Hearing Loss ◽  
Inner Ear ◽  
Sudden Hearing Loss ◽  
Caloric Test ◽  
Test Results ◽  
Vestibular Evoked Myogenic Potential ◽  
Early Recovery ◽  
Profound Hearing Loss ◽  
Myogenic Potential ◽  
Vestibular Assessment

AbstractObjective:To evaluate the correlation between caloric and vestibular evoked myogenic potential test results, initial audiogram data, and early hearing recovery, in patients with idiopathic sudden hearing loss.Materials and methods:One hundred and four patients with unilateral idiopathic sudden hearing loss underwent complete neurotological evaluation. Results for vestibular evoked myogenic potential and caloric testing were compared with patients' initial and final audiograms.Results:Overall, abnormal vestibular evoked myogenic potential responses occurred in 28.8 per cent of patients, whereas abnormal caloric test results occurred in 50 per cent. A statistically significant relationship was found between the type of inner ear lesion and the incidence of profound hearing loss. Moreover, a negative correlation was found between the extent of the inner ear lesion and the likelihood of early recovery.Conclusion:In patients with idiopathic sudden hearing loss, the extent of the inner ear lesion tends to correlate with the severity of cochlear damage. Vestibular assessment may be valuable in predicting the final outcome.

The Use of Vestibular Test Battery to Identify the Stages of Delayed Endolymphatic Hydrops

2012 ◽  
Vol 147 (5) ◽  
pp. 912-918 ◽  
Author(s):  
Mei-Chun Lin ◽  
Yi-Ho Young
Keyword(s):  
Endolymphatic Hydrops ◽  
Early Stage ◽  
Clinical Stage ◽  
Case Series ◽  
Test Battery ◽  
University Hospital ◽  
Caloric Test ◽  
Median Frequency ◽  
Test Results ◽  
Delayed Endolymphatic Hydrops

Objective Patients with delayed endolymphatic hydrops (DEH) underwent a vestibular test battery to evaluate the residual function, assess their clinical stage, and predict outcome. Study Design Case series with chart review. Setting University hospital. Subjects and Methods Twenty patients with DEH, 15 with ipsilateral type and 5 with contralateral type, were enrolled. All patients underwent audiometry and caloric, ocular vestibular-evoked myogenic potential (oVEMP), and cervical VEMP (cVEMP) tests. The DEH staging was based on vestibular test results. Stage 0 indicates that all 3 vestibular tests are normal, while stages I through III indicate abnormal results in tests 1 through 3, respectively. Results Of the 20 DEH patients, 2 patients were stage 0, 12 patients were stage I, 4 patients were stage II, and 2 patients were stage III. The median frequency of vertigo in patients with stages II and III was 4 episodes monthly, significantly less than 15 episodes monthly in those with stages 0 and I. Ipsilateral and contralateral types did not differ significantly in the stage distribution. The percentages of abnormal cVEMP, oVEMP, and caloric test results for patients with ipsilateral type were 80%, 33%, and 13%, not significantly different from those for contralateral type. Conclusions As a vertiginous attack may subside spontaneously for patients with long-term DEH, one must identify its clinical stage based on cVEMP, oVEMP, and caloric test results. In early stage DEH, most vestibular function remained relatively intact, leading to repeated vertiginous attacks. Conversely, subsidence of vertiginous episode can be anticipated in patients with late stage DEH.

Vestibular Functions of Hereditary Hearing Loss Patients with GJB2 Mutations

2015 ◽  
Vol 20 (3) ◽  
pp. 147-152 ◽  
Author(s):  
Keita Tsukada ◽  
Hisakuni Fukuoka ◽  
Shin-ichi Usami
Keyword(s):  
Gjb2 Gene ◽  
Caloric Test ◽  
Congenital Deafness ◽  
Lateral Semicircular Canal ◽  
Vestibular Evoked Myogenic Potential ◽  
Causative Gene ◽  
Myogenic Potential ◽  
Vestibular Testing ◽  
Vestibular Symptoms ◽  
Gjb2 Mutations

Objectives: Mutations in the GJB2 gene have been of particular interest as it is the most common causative gene for congenital deafness in all populations. Detailed audiological features, including genotype-phenotype correlations, have been well documented. However, in spite of abundant gene as well as protein expression in the vestibular end organs, neither vestibular symptoms nor vestibular functions have yet been elucidated. In the present study, vestibular functions were evaluated in patients diagnosed with GJB2-related deafness. Subjects and Methods: Vestibular functions were evaluated by caloric test and cervical vestibular evoked myogenic potential (cVEMP) testing in 24 patients with biallelic GJB2 mutations. Results and Discussion: Twenty-one of 23 patients (91.3%) had normal caloric responses and significantly lower cVEMP amplitudes than the control subjects. In the patients who were able to undergo vestibular testing, the mostly normal reactions to caloric testing indicated that the lateral semicircular canal was intact. However, the majority of GJB2 patients showed low cVEMP reactions, indicating a saccular defect.

scholarly journals Similarities and Differences Between Vestibular and Cochlear Systems – A Review of Clinical and Physiological Evidence

2021 ◽  
Vol 15 ◽  
Author(s):  
Ian S. Curthoys ◽  
John Wally Grant ◽  
Christopher J. Pastras ◽  
Laura Fröhlich ◽  
Daniel J. Brown
Keyword(s):  
Structural Changes ◽  
Endolymphatic Hydrops ◽  
Vestibular Function ◽  
Auditory Brainstem ◽  
Type I ◽  
Vestibular Evoked Myogenic Potential ◽  
Unique Type ◽  
Myogenic Potential ◽  
Brainstem Response ◽  
Similarities And Differences

The evoked response to repeated brief stimuli, such as clicks or short tone bursts, is used for clinical evaluation of the function of both the auditory and vestibular systems. One auditory response is a neural potential — the Auditory Brainstem Response (ABR) — recorded by surface electrodes on the head. The clinical analogue for testing the otolithic response to abrupt sounds and vibration is the myogenic potential recorded from tensed muscles — the vestibular evoked myogenic potential (VEMP). VEMPs have provided clinicians with a long sought-after tool — a simple, clinically realistic indicator of the function of each of the 4 otolithic sensory regions. We review the basic neural evidence for VEMPs and discuss the similarities and differences between otolithic and cochlear receptors and afferents. VEMPs are probably initiated by sound or vibration selectively activating afferent neurons with irregular resting discharge originating from the unique type I receptors at a specialized region of the otolithic maculae (the striola). We review how changes in VEMP responses indicate the functional state of peripheral vestibular function and the likely transduction mechanisms allowing otolithic receptors and afferents to trigger such very short latency responses. In section “ELECTROPHYSIOLOGY” we show how cochlear and vestibular receptors and afferents have many similar electrophysiological characteristics [e.g., both generate microphonics, summating potentials, and compound action potentials (the vestibular evoked potential, VsEP)]. Recent electrophysiological evidence shows that the hydrodynamic changes in the labyrinth caused by increased fluid volume (endolymphatic hydrops), change the responses of utricular receptors and afferents in a way which mimics the changes in vestibular function attributed to endolymphatic hydrops in human patients. In section “MECHANICS OF OTOLITHS IN VEMPS TESTING” we show how the major VEMP results (latency and frequency response) follow from modeling the physical characteristics of the macula (dimensions, stiffness etc.). In particular, the structure and mechanical operation of the utricular macula explains the very fast response of the type I receptors and irregular afferents which is the very basis of VEMPs and these structural changes of the macula in Menière’s Disease (MD) predict the upward shift of VEMP tuning in these patients.

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