Accession Number : AD0622160

Title :   THE INFLUENCE OF VISUAL ORIENTATION ON APPARENT BODILY ROTATION FOLLOWING ACTUAL ROTATION.

Descriptive Note : Research rept.,

Corporate Author : TULANE UNIV NEW ORLEANS LA

Personal Author(s) : Guedry,F. E. ,Jr. ; ray,J. T. ; Niven,J. I.

Report Date : 14 JAN 1952

Pagination or Media Count : 7

Abstract : Feelings of apparent bodily rotation are very similar in their general characteristics to the oculogyral illusion. This 'postural component' can be reported independently of the visual illusion. Three experienced observers were required to report it under two conditions of rotary acceleration and deceleration, identical except that in one there was interpolated a 5 sec. period of general room illumination following deceleration. All observers reported the first effect and the beginning of the second effect in the totally dark condition, but feelings of apparent bodily rotation were inhibited by the visual orientation afforded during illumination of the room. Duration of the first effect was significantly reduced for all observers; time to the beginning of the second effect was reduced for two observers, while the second effect was completely abolished for the third. (Author)

Descriptors :   (*ROTATION, AFTERIMAGES), (*AFTERIMAGES, ROTATION), (*VISION, AFTERIMAGES), ILLUSIONS, POSTURE(PHYSIOLOGY), ACCELERATION, DECELERATION, ADAPTATION(PHYSIOLOGY), ILLUMINATION, PERCEPTION, HUMAN BODY, EYE, VESTIBULAR APPARATUS

Distribution Statement : APPROVED FOR PUBLIC RELEASE