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Instability of ocular torsion in zero gravity - Possible implications for space motion sicknessIt is proposed that study of the eye torsion reflex and its behavior under novel gravitational states may possibly provide the basis for a long-sought test to predict space motion sickness (SMS). Measures of eye torsion such as ocular counterrolling and spontaneous eye torsion, were examined during hypo- and hypergravity in parabolic flight on the NASA KC-135 aircraft. Ten subjects, including two astronauts, one who had experienced SMS and one who had not, were ranked according to scores of torsional inability at 0 G and divided into two equal groups of high and low susceptibility to SMS. At 1.8 G the groups were significantly different in both the instability measure and the measure of torsional ability. No differences were detected in eye torsion in either 0 G or 1.8 G and none of the tests were significantly different in 1 G. Results suggest that tests of eye torsion on the KC-135 might differentiate those who would experience SMS from those who would not, although it is noted that this is not yet proven.
Document ID
19900064338
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Diamond, Shirley G.
(California Univ. Los Angeles, CA, United States)
Markham, Charles H.
(California, University Los Angeles, United States)
Money, Ken E.
(National Research Council of Canada Astronaut Program Office, Ottawa, United States)
Date Acquired
August 14, 2013
Publication Date
October 1, 1990
Publication Information
Publication: Aviation, Space, and Environmental Medicine
Volume: 61
ISSN: 0095-6562
Subject Category
Aerospace Medicine
Accession Number
90A51393
Funding Number(s)
CONTRACT_GRANT: NAG9-179
Distribution Limits
Public
Copyright
Other

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