COMPARISON OF SUSCEPTIBILITY TO MOTION SICKNESS DURING ROTATION AT 30 RPM IN EARTH-HORIZONTAL, 10DEGREES HEAD-UP, AND 10DEGREES HEAD-DOWN POSITIONS

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  • 1 January 1977
    • journal article
    • research article
    • Vol. 48  (1) , 7-11
Abstract
Normal persons rotated about an Earth-horizontal axis vary in their susceptibility to motion sickness. Intraindividual differences in susceptibility was measured in 12 subjects when rotated 10.degree. head up and 10.degree. head down and in the horizontal position. Subjects assumed the test-position 60 min prior to rotation, thus providing an opportunity for translocation of body fluids. Physiological and psychophysical measurements were conducted throughout the experiment. There were no intraindividual differences in susceptibility to motion sickness in the 3 positions tested, although there were significant differences in vital capacity, demonstrating the expected fluid shifts. In the sample of subjects tested, short-term effects of fluid shifts greater than those that would be manifested in zero gravity had no definite effect on motion sickness susceptibility.

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