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https://www.readbyqxmd.com/read/28906242/safe-use-of-acoustic-vestibular-evoked-myogenic-potential-stimuli-protocol-and-patient-specific-considerations
#1
Cory D F Portnuff, Samantha Kleindienst, Jamie M Bogle
BACKGROUND: Vestibular-evoked myogenic potentials (VEMPs) are commonly used clinical assessments for patients with complaints of dizziness. However, relatively high air-conducted stimuli are required to elicit the VEMP, and ultimately may compromise safe noise exposure limits. Recently, research has reported the potential for noise-induced hearing loss (NIHL) from VEMP stimulus exposure through studies of reduced otoacoustic emission levels after VEMP testing, as well as a recent case study showing permanent sensorineural hearing loss associated with VEMP exposure...
September 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28906238/safe-stimulus-intensities-for-vemp-testing
#2
EDITORIAL
Gary P Jacobson
No abstract text is available yet for this article.
September 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28861037/the-clinical-utility-of-vestibular-evoked-myogenic-potentials-in-the-diagnosis-of-m%C3%A3-ni%C3%A3-re-s-disease
#3
REVIEW
Maxime Maheu, Jenny Marylin Alvarado-Umanzor, Audrey Delcenserie, François Champoux
Ménière's disease (MD) is a condition that has been proposed over 150 years ago, which involves audiological and vestibular manifestations, such as aural fullness, tinnitus, vertigo, and fluctuating hearing thresholds. Over the past few years, many researchers have assessed different techniques to help diagnose this pathology. Vestibular-evoked myogenic potential (VEMP) is an electrophysiological method assessing the saccule (cVEMP) and the utricule (oVEMP). Its clinical utility in the diagnosis of multiple pathologies, such as superior canal dehiscence, has made this tool a common method used in otologic clinics...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28777976/otoliths-accelerometer-and-seismometer-implications-in-vestibular-evoked-myogenic-potential-vemp
#4
Wally Grant, Ian Curthoys
Vestibular otolithic organs are recognized as transducers of head acceleration and they function as such up to their corner frequency or undamped natural frequency. It is well recognized that these organs respond to frequencies above their corner frequency up to the 2-3 kHz range (Curthoys et al., 2016). A mechanics model for the transduction of these organs is developed that predicts the response below the undamped natural frequency as an accelerometer and above that frequency as a seismometer. The model is converted to a transfer function using hair cell bundle deflection...
July 27, 2017: Hearing Research
https://www.readbyqxmd.com/read/28749204/revision-of-a-furosemide-loading-vestibular-evoked-myogenic-potential-protocol-for-detecting-endolymphatic-hydrops
#5
Toru Seo, Ko Shiraishi, Takaaki Kobayashi, Kitano Mutsukazu, Takeshi Fujita, Kazuya Saito, Katsumi Doi
OBJECTIVE: The presence of endolymphatic hydrops can be suggested by improving the amplitude of vestibular-evoked myogenic potential (VEMP) after furosemide administration (furosemide loading VEMP [FVEMP]). The authors aimed to determine a stimulation frequency and judgment criteria to ascertain whether a revised FVEMP protocol can be applied to clinical settings. METHODS: The study included 25 individuals with unilateral Meniere's disease (MD) and 11 normal healthy volunteers...
July 27, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28746415/the-potential-dysfunction-of-otolith-organs-in-patients-after-mumps-infection
#6
Yu-Juan Zhou, Jing Yu, Yong-Zhen Wu, Liang Tian, Zhao Han, Jing Wang, Fang-Lu Chi
OBJECTIVE: To investigate the relationship between mumps and the extent of hearing impairment and otolith organ damage. METHODS: A total of 27 patients with unilateral hearing impairment following mumps were enrolled. The degrees of hearing loss and otolith organ damage were confirmed by audiometric and vestibular evoked myogenic potential [VEMP] tests. All the results were compared and analyzed using Stata 13.0 software for Windows. RESULTS: The VEMP thresholds of the affected ears were significantly higher than those of the unaffected ears in both tests (cervical VEMP [cVEMP] test and ocular VEMP [oVEMP] test; p = 0...
2017: PloS One
https://www.readbyqxmd.com/read/28719825/degeneration-of-the-vestibular-nerve-in-unilateral-meniere-s-disease-evaluated-by-galvanic-vestibular-evoked-myogenic-potentials
#7
Chih-Ming Chang, Yi-Ho Young, Fu-Shan Jaw, Chi-Te Wang, Po-Wen Cheng
OBJECTIVE: The staging system of Meniere's disease utilizes audiograms to probe cochlear dysfunction. We explored the addition of galvanic vestibular-evoked myogenic potentials (VEMP) to further explore vestibular function. METHODS: Seventy patients with unilateral Meniere's disease were enrolled in this study. Within 2weeks of diagnosis, all subjects underwent pure tone audiometry, cervical and ocular VEMP, and caloric test. The prevalence of abnormal tests and the VEMP characteristic parameters such as latencies and amplitudes were analyzed...
September 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28667933/contrasting-results-of-tests-of-peripheral-vestibular-function-in-patients-with-bilateral-large-vestibular-aqueduct-syndrome
#8
Yu-Juan Zhou, Yong-Zhen Wu, Ning Cong, Jing Yu, Jun Gu, Jing Wang, Fang-Lu Chi
OBJECTIVE: To analyze and summarize the effect of bilateral large vestibular aqueducts in peripheral vestibular organ function. METHODS: Eighteen patients with bilateral large vestibular aqueduct syndrome (LVAS; Study Group) and 18 healthy volunteers (Control Group) were investigated using audiometry, caloric test, sensory organization test (SOT), and vestibular-evoked myogenic potential (VEMP) tests. RESULTS: All 18 patients (36 ears) exhibited sensorineural hearing loss...
August 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28653555/usher-s-syndrome-type-ii-a-comparative-study-of-genetic-mutations-and-vestibular-system-evaluation
#9
Giuseppe Magliulo, Giannicola Iannella, Silvia Gagliardi, Nicola Iozzo, Rocco Plateroti, Alessandro Mariottini, Francesca Torricelli
Objective Usher's syndrome type II (USH2) is characterized by moderate to profound congenital hearing loss, later onset of retinitis pigmentosa, and normal vestibular function. Recently, a study investigating the vestibular function of USH2 patients demonstrated a pathologic response to vestibular tests. In this cross-sectional study we performed vestibular tests of a group patients with genetic diagnosis of USH2 syndrome to demonstrate if vestibular damage is present in USH2 patients. Study Design Cross-sectional study...
June 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28639553/can-we-improve-pressure-feedback-methods-in-vestibular-evoked-myogenic-potentials-by-applying-custom-pressures
#10
Ömer Afşin Özmen, Kasım Özlük, Süay Özmen, Oğuz Basut
OBJECTIVE: The aim of the present study was to use constant and customized pressure levels to improve the feedback method of the blood pressure cuff technique in order to decrease intra-subject and inter-subject variability. MATERIALS AND METHODS: The study was conducted in two stages. In the first stage, the relationship between the pressure level generated in the blood pressure cuff and electromyographic response in the sternocleidomastoid (SCM) muscle was investigated...
June 21, 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28595652/effect-of-cochlear-implant-surgery-on-vestibular-function-meta-analysis-study
#11
REVIEW
Iman Ibrahim, Sabrina Daniela da Silva, Bernard Segal, Anthony Zeitouni
IMPORTANCE: Vestibular disorders have been reported following cochlear implant (CI) surgery, but the literature shows a wide discrepancy in the reported clinical impact. The aim of this meta-analysis is to quantify the effect of CI before and after surgery on the outcomes of vestibular tests, postural stability, and subjective perception of dizziness. OBJECTIVE: To evaluate the effects of CI surgery on vestibular function in adult patients (≥18 years) with sensorineural hearing loss who underwent unilateral or bilateral implantation...
June 8, 2017: Journal of Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28556777/the-force-sensing-peptide-vemp-employs-extreme-compaction-and-secondary-structure-formation-to-induce-ribosomal-stalling
#12
Ting Su, Jingdong Cheng, Daniel Sohmen, Rickard Hedman, Otto Berninghausen, Gunnar von Heijne, Daniel N Wilson, Roland Beckmann
Interaction between the nascent polypeptide chain and the ribosomal exit tunnel can modulate the rate of translation and induce translational arrest to regulate expression of downstream genes. The ribosomal tunnel also provides a protected environment for initial protein folding events. Here, we present a 2.9 Å cryo-electron microscopy structure of a ribosome stalled during translation of the extremely compacted VemP nascent chain. The nascent chain forms two α-helices connected by an α-turn and a loop, enabling a total of 37 amino acids to be observed within the first 50-55 Å of the exit tunnel...
May 30, 2017: ELife
https://www.readbyqxmd.com/read/28534730/big-stimulus-little-ears-safety-in-administering-vestibular-evoked-myogenic-potentials-in-children
#13
Megan L A Thomas, Denis Fitzpatrick, Ryan McCreery, Kristen L Janky
BACKGROUND: Cervical and ocular vestibular-evoked myogenic potentials (VEMPs) have become common clinical vestibular assessments. However, VEMP testing requires high intensity stimuli, raising concerns regarding safety with children, where sound pressure levels may be higher due to their smaller ear canal volumes. PURPOSE: The purpose of this study was to estimate the range of peak-to-peak equivalent sound pressure levels (peSPLs) in child and adult ears in response to high intensity stimuli (i...
May 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28446417/the-value-of-vestibular-rehabilitation-in-patients-with-bilateral-vestibular-dysfunction
#14
Ethem Şahin, Mehmet Emre Dinç, Berna Yayla Özker, Canan Çöpürgensli, Mustafa Konaklıoğlu, Tuncay Özçelik
OBJECTIVE: The value of vestibular rehabilitation in patients with bilateral vestibular dysfunction was investigated. MATERIALS AND METHODS: This study assessed 17 patients (9 males, 8 females) with bilateral vestibular dysfunction. Vestibular rehabilitation continued for 1.5 months. Videonystagmography tests (including oculomotor testing, positional testing, and caloric tests), vestibular evoked myogenic potential (VEMP) testing, and computerized dynamic posturography were performed during the pre-, mid-, and post-treatment periods...
April 27, 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28395490/-pilot-study-on-the-functional-evaluation-of-vestibular-otolith-organ-pathway-in-the-stage-of-patients-with-meniere-disease
#15
X R Niu, P Han, Z C Chen, Y Z Zhang, Y Gao, Y Cheng, J Hu, Y Xu, Q Zhang, M Xu
Objective: To observe the features of air-conducted sound elicited ocular vestibular-evoked myogenic potential(ACS-oVEMP) and cervical vestibular-evoked myogenic potential(ACS-cVEMP) in patients with Meniere disease (MD). To analyze the relationship between air-conducted sound elicited vestibular-evoked myogenic potentials (ACS-VEMP) responses and clinical stages of disease, as well as its clinical application of cervical and ocular vestibular evoked myogenic potentials in MD. Method: Fifty six patients with MD and 50 normal subjects (100 ears) were recruited for conventional cVEMP and oVEMP examinations...
March 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28344549/functional-brain-activation-in-response-to-a-clinical-vestibular-test-correlates-with-balance
#16
Fatemeh Noohi, Catherine Kinnaird, Yiri DeDios, Igor S Kofman, Scott Wood, Jacob Bloomberg, Ajitkumar Mulavara, Rachael Seidler
The current study characterizes brain fMRI activation in response to two modes of vestibular stimulation: Skull tap and auditory tone burst. The auditory tone burst has been used in previous studies to elicit either a vestibulo-spinal reflex [saccular-mediated colic Vestibular Evoked Myogenic Potentials (cVEMP)], or an ocular muscle response [utricle-mediated ocular VEMP (oVEMP)]. Research suggests that the skull tap elicits both saccular and utricle-mediated VEMPs, while being faster and less irritating for subjects than the high decibel tones required to elicit VEMPs...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28336540/effects-of-midline-sagittal-location-on-bone-conducted-cervical-and-ocular-vestibular-evoked-myogenic-potentials
#17
Sendhil Govender, James G Colebatch
We have investigated the effectiveness of two bone-conducted (BC) stimuli in producing vestibular evoked myogenic potentials (VEMPs) following stimulation along midsagittal skull sites. Twenty subjects (mean age 24 yr, range: 18-34 yr; 6 men; 14 women) were studied using a smoothed impulse and a 500-Hz tone burst applied to Nz, Fpz, AFz, Fz, FCz, and Cz with both compressive and rarefactive onset phases. Cervical (cVEMPs) and ocular VEMPs (oVEMPs) were recorded as well as linear acceleration in three axes. cVEMPs evoked by 500 Hz showed no change in response polarity to either stimulus location or phase...
June 1, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28328999/what-the-electrical-impedance-can-tell-about-the-intrinsic-properties-of-an-electrodynamic-shaker
#18
Bernd Lütkenhöner
Small electrodynamic shakers are becoming increasingly popular for diagnostic investigations of the human vestibular system. More specifically, they are used as mechanical stimulators for eliciting a vestibular evoked myogenic potential (VEMP). However, it is largely unknown how shakers perform under typical measurement conditions, which considerably differ from the normal use of a shaker. Here, it is shown how the basic properties of a shaker can be determined without requiring special sensors such as accelerometers or force gauges...
2017: PloS One
https://www.readbyqxmd.com/read/28323487/pathological-eye-movements-influence-on-the-recordings-of-ocular-vestibular-evoked-myogenic-potential
#19
Ting-Hua Yang, Hsin-Lin Chen, Yi-Ho Young
OBJECTIVE: This study investigated the influence of pathological eye movements on the recordings of ocular vestibulo-evoked myogenic potential (oVEMP). METHODS: Ten patients with pathological eye movements of non-vestibular origin (nine congenital nystagmus and one opsoclonus) who had negative MRI result were assigned to Group A. Another 20 vestibular neuritis (VN) patients with spontaneous nystagmus were assigned to Group B. Both groups underwent audiometry, and caloric, oVEMP and cervical VEMP (cVEMP) tests...
August 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28289399/auditory-and-vestibular-evoked-potentials-correlate-with-motor-and-non-motor-features-of-parkinson-s-disease
#20
Ali Soliman Shalash, Dalia Mohamed Hassan, Hanan Hani Elrassas, Mohamed Mosaad Salama, Edna Méndez-Hernández, José M Salas-Pacheco, Oscar Arias-Carrión
Degeneration of several brainstem nuclei has been long related to motor and non-motor symptoms (NMSs) of Parkinson's disease (PD). Nevertheless, due to technical issues, there are only a few studies that correlate that association. Brainstem auditory-evoked potential (BAEP) and vestibular-evoked myogenic potential (VEMP) responses represent a valuable tool for brainstem assessment. Here, we investigated the abnormalities of BAEPs, ocular VEMPs (oVEMPs), and cervical VEMPs (cVEMPs) in patients with PD and its correlation to the motor and NMSs...
2017: Frontiers in Neurology
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