Accession Number : AD0658494

Title :   RESEARCH ON INFORMATION PROCESSING IN THE CENTRAL NERVOUS SYSTEM.

Descriptive Note : Final rept. 1 Feb 62-31 Jan 66,

Corporate Author : MASSACHUSETTS GENERAL HOSPITAL BOSTON STANLEY COBB LABS FOR PSYCHIATRIC RESEARCH

Personal Author(s) : Ervin,Frank R.

Report Date : AUG 1967

Pagination or Media Count : 108

Abstract : An on-line computer controlled visual stimulation and computation of the post stimulus time histogram of single neurons in cat visual cortex was carried out. Three-hundred fifty cells are described as to temporal firing pattern and field response curves. In addition, the effects of background illumination and reticular formation stimulation were studied in a smaller number. These two variables were effective in modifying field response patterns primarily by modifying basal firing levels and excitability. The use of single spot stimulation suggests the existence of a receptive field which would show unique sensitivity to (simple) geometric form or motion without the convergent coding at the geniculate suggested in the literature. In addition, these fields prove to be capable of modulation by changing circumstance. This view of the structure of the visual cortex of the mammal necessitates some revision of simplistic models which have been advanced for hardware realization of pattern-recognizing artifacts. (Author)

Descriptors :   (*CENTRAL NERVOUS SYSTEM, *BIONICS), COMPUTER PROGRAMS, PATTERN RECOGNITION, VISUAL PERCEPTION, CEREBRAL CORTEX, ELECTROPHYSIOLOGY, STIMULATION(PHYSIOLOGY), NERVE CELLS, NERVE IMPULSES, CATS, INFORMATION THEORY

Subject Categories : Bionics

Distribution Statement : APPROVED FOR PUBLIC RELEASE