The Translational Vestibulo-Ocular Relfex (tVOR) in Pilots and Normal Controls

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Authors
  1. Tomlinson, R.D.
  2. Cheung, B.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Sunnybrook Health Sciences Centre, Toronto ONT (CAN) Dept of Otolaryngology
Abstract
The naso-occipital translation vestibulo-ocular reflex (NO-tVOR) was measured in 11 normal subjects in response to sudden, high acceleration head translations. Results indicated that the tVOR is very robust and has a latency of less than 20ms. This is less than half the value previously reported using lower acceleration stimuli. The effects of target distance on the evoked eye movements were also measured. Our results showed that target distance effects were only expressed well after the onset of the eye movement. Specifically, the first 85ms of the evoked eye movement was independent of target distance. Our results imply that although the tVOR has a shorter latency than previously believed, target distance effets on reflex sensitivity must employ far longer pathways than the initial reflex itself.
Keywords
Vestibulo-Ocular reflex;Linear acceleration
Report Number
DCIEM-CR-1999-053 — Contractor Report
Date of publication
24 Mar 1999
Number of Pages
18
DSTKIM No
99-01205
CANDIS No
511091
Format(s):
Hardcopy;Document Image stored on Optical Disk

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