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UAL Research Online

Ocular vestibular evoked myogenic potentials (OVEMPs) produced by whole-body vibration (WBV)

Todd, Neil and Bell, Steven and Paillard, Aurora and Griffin, Michael (2012) Ocular vestibular evoked myogenic potentials (OVEMPs) produced by whole-body vibration (WBV). Journal of Applied Physiology, 113 (10). pp. 1613-1623. ISSN 8750-7587

Type of Research: Article
Creators: Todd, Neil and Bell, Steven and Paillard, Aurora and Griffin, Michael
Description:

Abstract:

In this paper we report the results of an experiment to investigate the emergence of ocular vestibular evoked myogenic potentials (OVEMPs) during the linear vestibular ocular reflex (LVOR) evoked by whole-body vibration (WBV). OVEMP and electrooculogram (EOG) montages were employed to record periocular potentials (POPs) from six subjects during WBV in the nasooccipital (NO) axis over a range of frequencies from 0.5 to 64 Hz with approximately constant peak head acceleration of 1.0 ms^−2 (i.e., 0.1 g). Measurements were made in two context conditions: a fixation context to examine the effect of gaze eccentricity (0 vs. 20°), and a visual context, where a target was either head-fixed or earth-fixed. The principal results are that from 0.5 to 2 Hz POP magnitude in the earth-fixed condition is related to head displacement, so with constant acceleration at all frequencies it reduces with increasing frequency, but at frequencies greater than 2 Hz both POP magnitude and POP gain, defined as the ratio of POP magnitude at 20 and 0°, increase with increasing frequency. By exhibiting this high-pass characteristic, a property shared with the LVOR, the results are consistent with the hypothesis that the OVEMP, as commonly employed in the clinical setting, is a high-frequency manifestation of the LVOR. However, we also observed low-frequency acceleration following POPs in head-fixed conditions, consistent with a low-frequency OVEMP, and found evidence of a high-frequency visual context effect, which is also consistent with the OVEMP being a manifestation of the LVOR.

Official Website: http://jap.physiology.org/content/113/10/1613
Publisher/Broadcaster/Company: American Physiological Society
Your affiliations with UAL: Colleges > London College of Fashion
Date: 15 November 2012
Digital Object Identifier: 10.1152/japplphysiol.00375.2012
Date Deposited: 19 Oct 2016 11:41
Last Modified: 19 Oct 2016 11:42
Item ID: 10430
URI: http://ualresearchonline.arts.ac.uk/id/eprint/10430

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