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:: Volume 21, Issue 2 (30 2012) ::
aud 2012, 21(2): 42-49 Back to browse issues page
Ocular vestibular evoked myogenic potentials in normal-hearing adults
Maryam Ramezani1, Abdoreza Sheibanizade1, Akram Pourbakht1, Homa Zarinkoub2, Mohammad Kamali3, Seyede Nazanin Hajari1
1- Department of Audiology, School of Rehabilitation, Tehran University of Medical Sciences, Iran
2- Department of Audiology, Faculty of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3- Department of Rehabilitation Management, School of Rehabilitation, Tehran University of Medical Sciences, Iran
Abstract:   (9201 Views)

Background and Aim: Ocular vestibular-evoked myogenic potential (oVEMP) is a novel vestibular function test. This short-latency response can be recorded through contracting extraocular muscles by high-intensity acoustic stimulation and can be used to evaluate contralateral ocular-vestibular reflex. The aim of this study was to record and compare the amplitude, latency, asymmetry ratio and occurrence percentage of oVEMP (n10) and cervical VEMP (p13) responses in a group of normal adult subjects.
Methods: We carried out a cross-sectional study on 20 adult subjects&apos mean age 22.18 years, SD=2.19 with normal hearing sensitivity and no history of vestibular diseases. oVEMP and cVEMP responses in both ears were recorded using air conducted stimuli 500 Hz short tone burst, 95 dB nHL via insert earphone and compared.
Results: cVEMP was recorded in all subjects but oVEMP was absent in two subjects. Mean amplitude and latency were 140.77 μv and 15.56 ms in p13 and 3.18 μv and 9.32 ms in n10. There were statistically significant differences between p13 and n10 amplitudes (p<0.001).
Conclusion: This study showed that occurrence percentage and amplitude of oVEMP were less than those of cVEMP. Since these two tests originate from different sections of vestibular nerve, we can consider them as parallel vestibular function tests and utilize them for evaluation of vestibular disorders.

Keywords: Vestibule, ocular vestibular-evoked myogenic potentials, cervical vestibular-evoked myogenic potentials
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Type of Study: Research |
Received: 2011/08/11 | Accepted: 2011/11/28 | Published: 2013/10/14
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Volume 21, Issue 2 (30 2012) Back to browse issues page
شنوایی شناسی - دانشگاه علوم پزشکی تهران Bimonthly Audiology - Tehran University of Medical Sciences
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