INTERACTION OF VESTIBULAR STIMULI OF DIFFERENT MAGNITUDES AND OPPOSITE DIRECTIONS. PART I. PERCEPTION OF VISUAL APPARENT MOTION DURING ANGULAR ACCELERATIONS.
TULANE UNIV NEW ORLEANS LA
Pagination or Media Count:
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