Accession Number : AD0706336

Title :   MOTION SICKNESS PRODUCED BY HEAD MOVEMENT AS A FUNCTION OF ROTATIONAL VELOCITY.

Descriptive Note : Joint rept.,

Corporate Author : NAVAL AEROSPACE MEDICAL INST PENSACOLA FLA

Personal Author(s) : Miller,Earl F. , II ; Graybiel,Ashton

Report Date : MAR 1970

Pagination or Media Count : 15

Abstract : To measure the stressor stimulus effect of rotational velocity in terms of the number of the standardized head tilt movements required to evoke a common severity level of symptoms characterizing motion sickness, sixteen young healthy subjects were rotated in a laboratory (Stille) rotational chair at various velocities within a range suitable for each subject and the limits of 1.0 to 30.0 rpm. Standardized 90 degree head movements were executed at each test velocity until the preselected and quantitatively determined motion sickness endpoint of moderate (M IIA) or severe (M III) malaise was reached. When individual ability to make head movements without evoking symptoms was exceeded, the derived average stressor effect (E factor) of each head movement varied directly and, in log-log terms, linearly with rotational velocity. These data provide the basis for grading individual susceptibility to Coriolis (motion) sickness with a single numerical score as well as define the high rate of change of Coriolis stressor effect as a function of rotational velocity, which may find practical application for specifying rotational rates of space stations. (Author)

Descriptors :   (*MOTION SICKNESS, ROTATION), STRESS(PHYSIOLOGY), SPACE BIOLOGY, VELOCITY, MEASUREMENT, STIMULATION(PHYSIOLOGY), TOLERANCES(PHYSIOLOGY)

Subject Categories : Stress Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE