Correlation between acceleration magnitude and ocular vestibular-evoked myogenic potential

► The lowest acceleration magnitude for eliciting oVEMPs along the y-axis was 0.16±0.08g. ► Increasing acceleration magnitude may have more synchronized firing of vestibular afferents. ► Acceleration magnitude is significantly correlated with the oVEMP amplitude. This study combined bone-conducted v...

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Bibliographic Details
Published in:Neuroscience letters 2012-05, Vol.516 (1), p.75-78
Main Authors: Wang, Shou-Jen, Jaw, Fu-Shan, Young, Yi-Ho
Format: Article
Language:English
Subjects:
Acceleration
Acceleration magnitude
Adult
Bone-conducted vibration
Evoked Potentials - physiology
Female
Humans
Male
Ocular vestibular-evoked myogenic potential (oVEMP)
Oculomotor Muscles - physiology
Physical Stimulation - methods
Reflex, Vestibulo-Ocular - physiology
Statistics as Topic
Vibration
Young Adult
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Summary:► The lowest acceleration magnitude for eliciting oVEMPs along the y-axis was 0.16±0.08g. ► Increasing acceleration magnitude may have more synchronized firing of vestibular afferents. ► Acceleration magnitude is significantly correlated with the oVEMP amplitude. This study combined bone-conducted vibration (BCV) stimulation with triaxial accelerometry to correlate the acceleration magnitudes of BCV stimuli with ocular vestibular-evoked myogenic potential (oVEMP) test results. Fourteen healthy volunteers underwent oVEMP test using BCV stimuli with simultaneous monitoring the triaxial acceleration. All (100%) subjects exhibited clear oVEMPs in response to BCV stimuli from a vibrator. The lowest acceleration magnitudes for eliciting oVEMPs along the x-, y- and z-axes were 0.05±0.01g, 0.16±0.08g, and 0.04±0.01g, respectively, exhibiting significantly higher acceleration magnitude along the y-axis than those along the x- and z-axes. In addition, significantly positive correlations were noted between the acceleration magnitude along each axis and the oVEMP amplitude. In conclusion, measuring the acceleration magnitude throughout oVEMP testing revealed a significant correlation between linear acceleration and oVEMP responses. Restated, increasing acceleration magnitude may have more synchronization of firing of vestibular afferents, resulting in more synchronized evoked potentials and greater oVEMP amplitude.
ISSN:0304-3940
1872-7972
DOI:10.1016/j.neulet.2012.03.061