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Fulltext Effects of plateau time on cervical vestibular evoked myogenic potential (cvemp) elicited by 500-hz tone burst

Mohd Fairul Syafiq Harun, Vijay Marimuthu

Jurnal Sains Kesihatan Malaysia, 2016;14(1):31-36.
MyJurnal

Cervical Vestibular Evoked Myogenic Potential (cVEMP) is a routine vestibular test which checks the integrity of
vestibulocollic reflex (VCR) pathway. Clinically, 500-Hz tone burst is widely used stimulus to evoke a cVEMP. Although
several studies have suggested different plateau times (PT) for eliciting cVEMPs, but not many have reported the optimal
PT for evoking cVEMP using 500 Hz tone burst stimuli. Therefore, the present study aimed to investigate the effect of
PT on cVEMPs elicited by 500 Hz tone burst at 95 dBnHL using four different PT (0, 2, 4 and 10 ms). Thirty healthy
adults with normal hearing and vestibular systems participated in this study. Results revealed that the P1 latency was
significantly longer for PT 10 ms compared to other PTs. N1 latency was significantly prolonged for long PT of 10 ms
compared to PT 2 ms. P2 latency showed no significant differences among PTs. The P1-N1 inter-amplitude values
however revealed no significant difference across all PTs. It was found that the P1-N1 inter-amplitude was severely
affected after 4 ms of PT. This study concluded that the PT of either 0 or 2 ms yielded the most robust cVEMP.

Matched MeSH terms: Vestibular Evoked Myogenic Potentials
cVEMPs and oVEMPs normative data in Malaysian preschool and primary school-aged children

Ahmad SA, Abdul Wahat NH, Zakaria MN, Wiener-Vacher SR, Abdullah NA

Int J Pediatr Otorhinolaryngol, 2020 Aug;135:110132.
PMID: 32502914 DOI: 10.1016/j.ijporl.2020.110132

OBJECTIVE: Vestibular assessments in children are essential for the early identification of vestibular and balance dysfunctions. Vestibular evoked myogenic potentials, cervical (cVEMPs) and ocular (oVEMPs) have been reported to be feasible and effective when assessing otolith function in children. The main aim of the study was to obtain normative data for cVEMPs and oVEMPs from preschool and primary school-aged Malaysian children.
METHODS: A group of 33 healthy children, aged from 5 years 9 months-12 years 4 months (mean ± SD = 8.83 ± 1.92 years), was recruited. Their otolith saccular function was assessed using 750 Hz tone burst for cVEMPs (with ER3A insert phone), while their utricular function was assessed using Brüel & Kjaer Mini-shaker Type 4810 (Naerum, Denmark) for oVEMPs.
RESULTS: For cVEMPs, the mean value of P13 latency, N23 latency, P13-N23 interamplitude and asymmetry ratio were 12.62 ± 1.38 ms, 19.85 ± 1.95 ms, 92.47 ± 50.35 μV and 14.03 ± 9.75%, respectively. For oVEMPs, the mean value of N10 latency, P15 latency, N10-P15 interamplitude and asymmetry ratio were 9.23 ± 1.07 ms, 14.41 ± 1.04 ms, 10.32 ± 5.65 μV and 15.84 ± 11.49%, respectively. Two-way ANOVA analysis found that ear laterality and gender had no significant effect on all cVEMPs and oVEMPs parameters. No significant correlation was found between age and all VEMPs parameters.
CONCLUSIONS: The normative data for cVEMPs and oVEMPs obtained in this study can be used as a guide by health professionals to assess saccular and utricular functions among children age from 5 to 12 years of age.

Matched MeSH terms: Vestibular Evoked Myogenic Potentials*
Fulltext The effects of different types of stimulus and its test-retest reliability on cervical evoked myogenic potential (CVEMP) results

Mohamad Amir Faisal Mohd Saufi, Nur Hafizah Sulaiman, Sarah Rahmat

International Medical Journal Malaysia, 2017;16(11):11-0.
MyJurnal

The Cervical Vestibular Evoked Myogenic Potential (cVEMP) is used to
evaluate the integrity of saccule and inferior vestibular nerve. There are a lot of factors
affecting cVEMP results including stimulus types. This study was carried out to determine
the effects of different stimuli on cVEMP results and its test-retest reliability. (Copied from article).

Matched MeSH terms: Vestibular Evoked Myogenic Potentials
Fulltext Considerations when Analyzing Vestibular Evoked Myogenic Potential (VEMP) Outcomes Elicited by Chirp Stimulus in Healthy Participants

Zakaria MN, Zainun Z, Cheu Lih A

J Int Adv Otol, 2015 Dec;11(3):271-2.
PMID: 26915164 DOI: 10.5152/iao.2015.1703
Matched MeSH terms: Vestibular Evoked Myogenic Potentials/physiology*
Fulltext Sensitivity and specificity of vestibular evoked myogenic potential elicited by different tone bursts to diagnose peripheral vestibular disordered

Zuraida Zainun, Mohd Normani Zakaria, Din Suhaimi Sidek, Zalina Ismail

Malaysian Journal of Medicine and Health Sciences, 2014;10(2):9-17.
MyJurnal

Peripheral vestibular disorder (PVD) is serious and common. Clinically, giving an accurate diagnosis of PVD can be challenging. Vestibular evoked myogenic potential (VEMP) is an objective test to evaluate the integrity of vestibular organs, particularly saccule and/or inferior vestibular nerve. This study was performed to determine the sensitivity and specificity of VEMP using different stimuli. Fourty normal and 65 PVD subjects who fulfilled the inclusion criteria were recruited. While sitting comfortably, VEMP waveforms were recorded with active electrode on sternocleidomastoid muscle and negative electrode on upper forehead. Tone bursts (500, 750 and 1000 Hz) were delivered via headphones at 90 dBnHL and 5/s presentation rate. VEMP parameters for each stimulus (amplitude and latency of P1 and N1 peak) were analyzed accordingly. Receiver operating characteristic (ROC) was performed to determine the sensitivity and specificity of VEMP at different test frequencies. N1 amplitude of 750 Hz stimulus produced the most ideal sensitivity (65% on right and 63% on left) and specificity (83% on right and 78% on left). The importance of using a few tone bursts in VEMP test in order to minimize the false negative in cases might be encountered in clinics as the certain tone burst had inadequate sensitivity in detecting PVD cases. The 750 Hz stimulus produced the most ideal VEMP with adequate values of sensitivity and specificity, at least in this study.

Matched MeSH terms: Vestibular Evoked Myogenic Potentials