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Contributions of ocular vestibular evoked myogenic potentials and the electrooculogram to periocular potentials produced by whole-body vibration

Contributions of ocular vestibular evoked myogenic potentials and the electrooculogram to periocular potentials produced by whole-body vibration
Contributions of ocular vestibular evoked myogenic potentials and the electrooculogram to periocular potentials produced by whole-body vibration
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.

otoliths, ocular vemp, vibration
8750-7587
1613-1623
Todd, N.P.M.
d7ed96b2-08cc-4b9f-a20d-8de87fb2401a
Bell, S.L.
91de0801-d2b7-44ba-8e8e-523e672aed8a
Paillard, A.C.
bf162503-9e14-4ff1-8fa8-2a9fa0b7a883
Griffin, M.J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Todd, N.P.M.
d7ed96b2-08cc-4b9f-a20d-8de87fb2401a
Bell, S.L.
91de0801-d2b7-44ba-8e8e-523e672aed8a
Paillard, A.C.
bf162503-9e14-4ff1-8fa8-2a9fa0b7a883
Griffin, M.J.
24112494-9774-40cb-91b7-5b4afe3c41b8

Todd, N.P.M., Bell, S.L., Paillard, A.C. and Griffin, M.J. (2012) Contributions of ocular vestibular evoked myogenic potentials and the electrooculogram to periocular potentials produced by whole-body vibration. Journal of Applied Physiology, 113 (10), 1613-1623. (doi:10.1152/japplphysiol.00375.2012). (PMID:22984251)

Record type: Article

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.

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More information

e-pub ahead of print date: 13 September 2012
Published date: 15 November 2012
Keywords: otoliths, ocular vemp, vibration
Organisations: Human Sciences Group

Identifiers

Local EPrints ID: 346064
URI: http://eprints.soton.ac.uk/id/eprint/346064
ISSN: 8750-7587
PURE UUID: e18b339a-3190-4aa4-92e9-177a9d3df782
ORCID for M.J. Griffin: ORCID iD orcid.org/0000-0003-0743-9502

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Date deposited: 10 Dec 2012 14:28
Last modified: 08 Jan 2022 12:01

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Contributors

Author: N.P.M. Todd
Author: S.L. Bell
Author: A.C. Paillard
Author: M.J. Griffin ORCID iD

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