Human surge linear vestibulo-ocular reflex during tertiary gaze viewing.
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.
Tian
Jun-Ru
JR
Department of Opthalmology, University of California, Los Angeles, CA 90095-7002, USA. jrt@ucla.edu
Crane
Benjamin T
BT
Demer
Joseph L
JL
D005133:Eye Movements / Q000502:physiology*; D005403:Fixation, Ocular; D007839:Functional Laterality; D006801:Humans; D007700:Kinetics; D010037:Otolithic Membrane / Q000502:physiology; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology*