Accession Number : AD0620362

Title :   INTERACTION OF VESTIBULAR STIMULI OF DIFFERENT MAGNITUDES AND OPPOSITE DIRECTIONS. PART I. PERCEPTION OF VISUAL APPARENT MOTION DURING ANGULAR ACCELERATIONS.

Descriptive Note : Research rept.,

Corporate Author : TULANE UNIV NEW ORLEANS LA

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

Report Date : 08 DEC 1954

Pagination or Media Count : 17

Abstract : Normal head movements involve positive angular accelerations followed immediately by negative angular accelerations. The cupula-endolymph system of the semicircular canal in man may be assumed to respond to angular acceleration in the manner of a heavily-damped torsion pendulum. In this study, three subjects were accelerated to a predetermined level and then braked to a stop to produce positive and negative angular accelerations in quick succession. They reported on the direction and duration of apparent motion of a visual target (oculogyral illusion). The obtained data were fitted by theoretical equations which were derived from the standard differential equation for a torsion pendulum. The correspondence between theoretical and experimental data was satisfactory and these experiments tend to confirm the validity of the torsion pendulum analogy for semicircular canal function. (Author)

Descriptors :   (*VISUAL PERCEPTION, ACCELERATION), (*VESTIBULAR APPARATUS, STIMULATION(PHYSIOLOGY)), (*ILLUSIONS, VISUAL PERCEPTION), (*ACCELERATION, VISUAL PERCEPTION), (*SEMICIRCULAR CANALS, PHYSIOLOGY), STRESS(PHYSIOLOGY), MOTION, ROTATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE