J Korean Neurol Assoc.
2014 Nov;32(4):231-239. 10.0000/jkna.2014.32.4.231.
Vestibular-Evoked Myogenic Potentials: Sound- and Bone-Conducted Stimuli and Clinical Applications
- Affiliations
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- 1Gunsan Public Health Center, Gunsan, Korea.
- 2Department of Neurology, Chonbuk National University Hospital, Chonbuk National University School of Medicine, Jeonju, Korea. ohsun@jbnu.ac.kr
- KMID: 2343543
- DOI: http://doi.org/10.0000/jkna.2014.32.4.231
Abstract
- Vestibular stimulation by air-conducted sound (ACS), bone-conducted vibration (BCV), or electrical currents (galvanic stimulation) elicits vestibular evoked myogenic potentials (VEMPs) that are now widely used to assess otolith function. Conventional cervical VEMPs, which are a manifestation of the vestibulocollic reflex, measure electromyographic activity from surface electrodes placed over the tonically activated sternocleidomastoid muscles. VEMPs can also be recorded from the extraocular muscles using surface electrodes placed over the inferior oblique and inferior rectus muscles, known as ocular VEMPs (oVEMPs). oVEMPs are a manifestation of the vestibulo-ocular pathways. We describe herein the neurophysiological properties of VEMPs obtained in response to ACS and BCV stimulation, and outline the known characteristics of VEMPs in central and peripheral disorders commonly encountered in neuro-otology clinics.
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