Accession Number : AD0768699

Title :   Electrophysiological Investigation of Different Parts of the Cat's Auditory System under Conditions of a Sustained Rythmical Stimulation,

Corporate Author : ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA

Personal Author(s) : Altman,Ya. A.

Report Date : 07 AUG 1973

Pagination or Media Count : 19

Abstract : A statistically reliable drop in the amplitude of electrical responses of the cochlea, the internal geniculate body and the auditory zone of the cortex is noted during prolonged rhythmic stimulation of an animal that is awake. The response of the auditory zone of the cortex undergoes the greatest changes - a 35.4% reduction. The response of the internal geniculate body decreases by 30.5% and the neural component of the cochlea's response decreases by 23.8%. The microphonic component of the electrocutaneous algesic stimulation causes a restoration of electric response amplitudes to the original level. Analysis of experimental data indicate that decrease in electric response amplitudes takes place as a result of central influences that oppress the afferent impulse stream. Restoration of an electrical response amplitude after algesic stimulation is explained by excitation of the sympathetic nervous system and secretion of adrenalin.

Descriptors :   (*HEARING, *ELECTROPHYSIOLOGY), CEREBRAL CORTEX, EAR, AUDITORY NERVE, VESTIBULAR APPARATUS, STIMULATION(PHYSIOLOGY), SOUND, CATS, EXPERIMENTAL DATA, USSR

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE