Accession Number : ADA312823

Title :   Visuo-Ocular Performance During Vestibular Stimulation.

Descriptive Note : Final rept. 1 Jul 93-28 Feb 96,

Corporate Author : PITTSBURGH UNIV PA

Personal Author(s) : Furman, Joseph M. ; Carl, James A.

PDF Url : ADA312823

Report Date : 30 JUL 1996

Pagination or Media Count : 2

Abstract : During the reporting period, significant information has been obtained regarding the interaction between otolithic stimulation, semicircular canal stimulation, and visual stimulation. Results, published in a peer-reviewed journal have indicated that whereas human subjects can suppress semicircular canal-induced eye-movements by focusing on a head-fixed visual target, subjects have great difficulty suppressing eye movements induced by otolithic stimulation, specifically, eye movements induced by rotation about an off-vertical axis. This difference in visual-vestibular interaction between the semicircular canal-ocular reflexes and the otolith-ocular reflexes suggests that rotational acceleration-induced eye movements and linear accelaration-induced eye movements are generated by different central nervous system pathways. These studies form the basis for future research regarding multi-sensory integration, vestibular-induced eye movements and spatial orientation. Preliminary studies, not yet published, have assessed the ability of normal human subjects to generate volitional eye movements (saccades and pursuit) during vestibular stimulation. The work performed during the reporting period served as the basis for an application to the National institutes of Health regarding spatial reorientation. That proposal, Grant No. DCO1791, when funded, will enable a continuation of the studies begun during the reporting period with funds from AFOSR. Specifically, that project will allow a study of volitional eye movements during vestibular stimulation.

Descriptors :   *STIMULATION(PHYSIOLOGY), *VISION, *EYE, *VESTIBULAR APPARATUS, *EYE MOVEMENTS, SPATIAL DISTRIBUTION, HUMANS, ORIENTATION(DIRECTION), INTEGRATION, CENTRAL NERVOUS SYSTEM, SENSES(PHYSIOLOGY), SEMICIRCULAR CANALS.

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE