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Human Surge Linear Vestibulo‐Ocular Reflex during Tertiary Gaze Viewing
Author(s) -
TIAN JUNRU,
CRANE BENJAMIN T.,
DEMER JOSEPH L.
Publication year - 2005
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1196/annals.1325.051
Subject(s) - darkness , vestibulo–ocular reflex , reflex , vestibular system , acceleration , gaze , physics , linear acceleration , optics , ophthalmology , anatomy , audiology , medicine , artificial intelligence , computer science , classical mechanics
A bstract : The otolith‐mediated linear vestibulo‐ocular reflex (IVOR) was studied in 9 normal humans undergoing transient whole‐body surges at 0.5 g peak acceleration while viewing targets eccentrically placed in tertiary positions that combined horizontal and vertical eccentricities at distance of 15, 25, or 50 cm both in darkness and light. Mean velocity gain (±SEM) for the horizontal component was 0.61 ± 0.04 in darkness and increased to 0.72 ± 0.03 for visible targets ( P < 0.05 ), and for the vertical component was 0.54 ± 0.02 in darkness, not significantly different from horizontal component gain. For visible targets, vertical component gain significantly increased to 0.63 ± 0.04 ( P < 0.05 ) with visible targets, but remained significantly less than horizontal component gain.