Accession Number : AD0684782

Title :   MOTION SICKNESS SUSCEPTIBILITY UNDER WEIGHTLESS AND HYPERGRAVITY CONDITIONS GENERATED BY PARABOLIC FLIGHT.

Descriptive Note : Joint rept.,

Corporate Author : NAVAL AEROSPACE MEDICAL INST PENSACOLA FLA

Personal Author(s) : Miller,Earl F. , II ; Graybiel,Ashton ; Kellogg,Robert S. ; O'Donnell,Robert D.

Report Date : 13 JAN 1969

Pagination or Media Count : 19

Abstract : Motion sickness susceptibility of five labyrinthine-defective (L-D) and 25 normal subjects was tested under the force environments encountered in parabolic flight (0 g and hyper-g). The L-D subjects were uniformly symptomless, while the normal subjects revealed great inter- and intra-individual differences in susceptibility to motion sickness provoked by standardized head movements during: (1) the hypergravic and (2) the weightless phases of the parabolic maneuver while restrained; and (3) the weightless phase while being rotated in a chair. Four of six subjects tested under condition 1 were completely unaffected by the condition while two reacted with symptoms. Condition 2 provoked severe symptoms in five of the twelve subjects tested and moderate symptoms in one. Fifteen subjects tested under condition 3 revealed either a marked increase or decrease in susceptibility to Coriolis acceleration in weightlessness compared to terrestrial baseline measurements. (Author)

Descriptors :   (*MOTION SICKNESS, *WEIGHTLESSNESS), VESTIBULAR APPARATUS, SPACE FLIGHT, SPACE ENVIRONMENTS, PATHOLOGY, CORIOLIS EFFECT, ROTATION, SENSITIVITY

Subject Categories : Personnel Management and Labor Relations

Distribution Statement : APPROVED FOR PUBLIC RELEASE