Accession Number : AD0617754

Title :   COMPARATIVE EFFECTS OF PROLONGED ROTATION AT 10 RPM ON POSTURAL EQUILIBRIUM IN VESTIBULAR NORMAL AND VESTIBULAR DEFECTIVE HUMAN SUBJECTS,

Corporate Author : NAVAL SCHOOL OF AVIATION MEDICINE PENSACOLA FLA

Personal Author(s) : Fregly,Alfred R. ; Kennedy,Robert S.

Report Date : 23 MAR 1965

Pagination or Media Count : 24

Abstract : As a means of better understanding the role of the vestibular organs in relation to ataxic responses to prolonged rotation, two contrasting groups of subjects were studied to: 1) determine quantitatively to what extent two visually-enhanced postural equilibrium test performances of labyrinthine defective subjects (L-D's) on a single rail of optimum difficulty become disturbed along the time axis of rotation (Experiment A), and 2) compare the performances of L-D's with normals in terms of postrotation effects as studied with a new standarized ataxia test battery (Experiment B). Rotation-induced ataxia was superimposed to an appreciable extend upon the previously present and characteristic vestibular ataxia in the L-D's (Exp. A), and (in Exp. B), upon cessation, there were significant decrements on all Test Battery performances of the normal group, whereas in the L-D group significant decrements were observed only on the two visually-enhanced tests. Other findings, which were considered tentative, are discussed in terms of several unresolved methodological problems in such experiments. (Author)

Descriptors :   (*VESTIBULAR APPARATUS, ROTATION), (*POSTURE(PHYSIOLOGY), PSYCHOMOTOR TESTS), (*PSYCHOMOTOR TESTS, POSTURE(PHYSIOLOGY)), PERFORMANCE(HUMAN), MUSCULOSKELETAL SYSTEM, DISEASES, ADAPTATION(PHYSIOLOGY), STRESS(PHYSIOLOGY), PSYCHOPHYSIOLOGY, AVIATION MEDICINE

Distribution Statement : APPROVED FOR PUBLIC RELEASE