Accession Number : AD0633967

Title :   NEUROPHYSIOLOGIC CORRELATES OF SENSORY PERCEPTION.

Descriptive Note : Final scientific rept. 1 Feb 65-31 Jan 66,

Corporate Author : BRUSSELS UNIV (BELGIUM)

Personal Author(s) : Desmedt,John E.

Report Date : 15 MAR 1966

Pagination or Media Count : 14

Abstract : The functional capabilities and mode of operation of several parts of the feedback neural circuits related to acoustic sensory processing were further investigated in several animal species. The neurochemical properties of the efferent cochlear system of the bird have been defined, showing a.o. that strychnine and brucine block the efferent neural influence on the inner ear though with modalities different from those in mammals. The efferent inhibition behaves pharmacologically as a post-synaptic inhibition. In monkeys, the organization of corticofugal projections from the temporal areas of the cerebral cortex were investigated in detail with the Nauta and other technics. In related studies, psychophysiological methods were developed to assess the capabilities of monkeys namely in their dealing with complex acoustic stimuli. In the cat, the studies on acoustic system were mainly concerned with the correlation of physiological evidence related to centrifugal pathways of the auditory system with the anatomical studies performed with Nauta technic. Another series of experiments were made on human subjects in order to demonstrate objective changes in cerebral electrogenesis related to the performance of decision tasks. Clear-cut modifications of components of the sensory evoked potentials averaged by digital computers were described and used in the analysis of the cerebral mechanicsms underlying signal detection. (Author)

Descriptors :   (*PERCEPTION, *NERVOUS SYSTEM), AUDITORY PERCEPTION, PHYSIOLOGY, NERVE CELLS, EAR, STRYCHNOS ALKALOIDS, INHIBITION, PHARMACOLOGY, CEREBRAL CORTEX, PSYCHOPHYSIOLOGY, AUDITORY SIGNALS, STIMULATION(PHYSIOLOGY), ELECTROPHYSIOLOGY, DECISION MAKING, STRESS(PSYCHOLOGY), PERFORMANCE(HUMAN), NEUROMUSCULAR TRANSMISSION, MOTOR REACTIONS, MONKEYS, CATS, PIGEONS, HUMANS, BELGIUM

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE