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Studies of the horizontal vestibulo-ocular reflex in spaceflightChanges in the vestibulo-ocular reflex (VOR) during space flight have been suspected of contributing to space motion sickness. The horizontal VOR was studied in nine subjects on two space shuttle missions. Active unpaced head oscillation at 0.3 Hz was used as the stimulus to examine the gain and phase of the VOR with and without visual input, as well as the visual suppression of the reflex. No statistically significant changes were noted inflight in the gains or phase shifts of the VOR during any test condition, or between space motion sickness susceptible and nonsusceptible populations. Although VOR suppression was unaffected by spaceflight, the space motion sickness-susceptible group tended to exhibit greater error in the suppression than the nonsusceptible group. It is concluded that at this stimulus frequency, VOR gain is unaffected by space-flight, and any minor individual changes do not seem to contribute to space motion sickness.
Document ID
19920061930
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Thornton, William E.
(NASA Johnson Space Center Houston, TX, United States)
Uri, John J.
(General Electric Co., Mission Science Support Office, Houston TX, United States)
Moore, Tom
(Methodist Hospital Indianapolis, IN, United States)
Pool, Sam
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 15, 2013
Publication Date
August 1, 1989
Publication Information
Publication: Archives of Otolaryngology - Head & Neck Surgery
Volume: 115
ISSN: 0886-4470
Subject Category
Aerospace Medicine
Accession Number
92A44554
Distribution Limits
Public
Copyright
Other

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