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Publication AbstractsOptokinetic Nystagmus, Vection, and Motion SicknessMoira B. Flanagan, James G. May, Thomas G. DobieAviat Space Environ Med 2002; 73:1067-73 AbstractBackground: Two current theories concerning the etiology of motion sickness (MS)--the eye movement hypothesis and sensory conflict theory--were evaluated under conditions that manipulated the degree of optokinetic nystagmus (OKN) and/or vection. Method: Eye movement and perceptual responses were elicited with whole field stimulation in a vertically striped rotating drum and modulated with fixation and/or a restriction of the field of view (FOV). Measures of OKN, vection, and MS were recorded under the various conditions. Results: Both visual field restriction and/or fixation diminished circular vection, OKN, and MS. Conditions involving both fixation and restricted FOV resulted in greater reductions in MS than did either restriction alone. Conclusions: These findings lend support to a multi-factor explanation of MS, involving both sensory conflict and eye movement.Keywords: optokinetic nystagmus (OKN), vection, self-motion, motion sickness. Information on subscribing, and on obtaining copies of an article or of an entire issue. Table of Contents for Volume 73, Number 11 of the ASEM journal.
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