Accession Number:

ADA288794

Title:

Report on Grant AFOSR-91-0333 (Tennessee University).

Descriptive Note:

Annual rept. 1 Jul 93-30 Jun 94,

Corporate Author:

TENNESSEE UNIV MEMPHIS DEPT OF ANATOMYAND NEUROBIOLOGY

Personal Author(s):

• Nelson, Randall J.

Report Date:

1994-11-21

Pagination or Media Count:

84.0

Abstract:

Three research goats were accomplished during this third year. 1 Analysis of data indicated that the responsiveness of primary somatosensory SI cortical neurons is unattended if when behavioral conditions become unpredictable. This observation fits with the hypothesis that during stereotyped behavior, neuronal responsiveness is gated so that the CNS may partially engage in other activities. 2 SI cortical neurons that respond to vibratory go-cues for wrist movement with the greatest fidelity have their activity modulated just prior to movement onset. This observation fits with the hypothesis that prior to active movement, sensory inputs that are no longer behaviorally relevant are gated so as not to interfere with monitoring movement parameters by the primate CNS. 3 SI cortical neurons that may bind together other SI neurons with their rhythmic activity have this activity disrupted at go-cue onset and just prior to movement onset. This observation fits with the hypothesis that prior to behaviorally significant events, the activity of these neurons that may tonically gate other SI neurons is suppressed to allow the monitoring sensory events and the initiation of movements.

Descriptors:

• *BEHAVIOR
• *CENTRAL NERVOUS SYSTEM
• CIRCADIAN RHYTHMS
• MONITORING
• PARAMETERS
• RESPONSE
• NERVE CELLS
• UNIVERSITIES
• HYPOTHESES
• PRIMATES
• TENNESSEE
• GOATS
• SENSES(PHYSIOLOGY)

Subject Categories:

• Psychology
• Anatomy and Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE