Galvanic vestibular stimulation modulates the electrophysiological response during face processing.

Abstract:

:Although galvanic vestibular stimulation (GVS) is known to affect the speed and accuracy of visual judgments, the underlying electrophysiological response has not been explored. In the present study, we therefore investigated the effect of GVS on the N170 event-related potential, a marker commonly associated with early visual structural encoding. To elicit the waveform, participants distinguished famous from nonfamous faces that were presented in either upright or inverted orientation. Relative to a sham, stimulation increased the amplitude of the N170 and also elevated power spectra within the delta and theta frequency bands, components that have likewise been associated with face processing. This study constitutes the first attempt to model the effects of GVS on the electrophysiological response and, more specifically, indicates that unisensory visual processes linked to object construction are influenced by vestibular information. Given that reductions in the magnitude of both the N170 event-related potential and delta/theta activity accompany certain disease states, GVS may provide hitherto unreported therapeutic benefit.

journal_name

Vis Neurosci

journal_title

Visual neuroscience

authors

Wilkinson D,Ferguson HJ,Worley A

doi

10.1017/S0952523812000235

subject

Has Abstract

pub_date

2012-09-01 00:00:00

pages

255-62

issue

4-5

eissn

0952-5238

issn

1469-8714

pii

S0952523812000235

journal_volume

29

pub_type

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