SUDDEN-STOP VESTIBULOVISUAL TEST FOR RAPID ASSESSMENT OF MOTION SICKNESS MANIFESTATIONS

  • 1 January 1980
    • journal article
    • research article
    • Vol. 51  (1) , 21-23
Abstract
The test made use of a rotating chair mounted in a striped cylindrical enclosure, 4.6 m in diameter. The subject [human] was exposed to the following motion profile: with eyes covered he was accelerated at 15.degree./s2 to clockwise velocity of 300.degree./s and maintained at that velocity for 30 s. The chair was then decelerated to a stop within 1.5 s and maintained at rest for 30 s while physiological parameters and motion sickness symptoms were recorded. This procedure was repeated until a pre-selected motion sickness endpoint was reached or 20 stops were made. If the endpoint was not reached, testing continued without the blindfold while the subject passively viewed the striped enclosure; if the endpoint was still not reached after 20 stops, the direction of rotation was reversed. The subject''s score represented 1/2 the number of stops with eyes covered plus the number of stops with eyes open plus twice the number of stops after reversal of direction of rotation. Subjects [14] were each assessed 4 times; the average interval between tests was 3 days. The 1st test was usually a poor indicator of later performance. The 2nd test provided a satisfactory ranking of susceptibility to motion sickness. Four sessions provided an indication of the rates of acquisition and decay of adaptation. Some advantages and uses of this new test are summarized.

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