Accession Number : AD0684783

Title :   MOTION SICKNESS PRECIPITATED IN THE WEIGHTLESS PHASE OF PARABOLIC FLIGHT BY CORIOLIS ACCELERATIONS.

Descriptive Note : Joint rept.,

Corporate Author : NAVAL AEROSPACE MEDICAL INST PENSACOLA FLA

Personal Author(s) : Graybiel,Ashton ; Kennedy,Robert S. ; Kellogg,Robert S.

Report Date : 18 FEB 1969

Pagination or Media Count : 12

Abstract : Nineteen normal persons and three deaf subjects with bilateral loss of labyrinthine function (L-D subjects) were exposed to Coriolis accelerations during the brief periods of weightlessness in parabolic flighy by having them move their heads while rotating in a Barany chair at 30 rpm. None of the L-D but all of the normal subjects except three experienced motion sickness: Only one of eight subjects selected on the basis of insusceptibility to symptoms in standard parabolic flights was free of symptoms; the other seven were motion sick and completed on the average only six parabolas. Two of three subjects selected primarily on the basis of low susceptibility to Coriolis acceleration in a slow rotation room were symptom free, and one was motion sick but his level of symptoms did not reach the end point of severe malaise during ten parabolas. In addition to demonstrating susceptibility to motion sickness when exposed to Coriolis acceleration in the weightless phase of parabolic flight, the findings are important in emphasizing the difficulty in predicting susceptibility to motion sickness in novel force environments. (Author)

Descriptors :   (*MOTION SICKNESS, WEIGHTLESSNESS), SENSITIVITY, VESTIBULAR APPARATUS, SPACE FLIGHT, CORIOLIS EFFECT, STIMULATION(PHYSIOLOGY), STATISTICAL ANALYSIS

Subject Categories : Stress Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE