Accession Number : AD0740227

Title :   Electrophysiological Correlates of Behavioral Temporary Threshold Shifts in Chinchilla.

Descriptive Note : Technical rept.,

Corporate Author : CENTRAL INST FOR THE DEAF ST LOUIS MO

Personal Author(s) : Benitez,Luis D. ; Eldredge,Donald H. ; Templer,Jerry W.

Report Date : 01 FEB 1972

Pagination or Media Count : 27

Abstract : A previous test exposed chinchillas for seven days to an octave band of noise centered at 500 Hz and at 95 dB SPL to produce temporary shifts of behavioral auditory thresholds which required 4-7 days to recover to normal. In the present study physiological potentials were measured about 5, 24, and 48 hours after exposures to the same noise for 2 or 3 days. Cochlear microphonoic responses and dc endocochlear potentials were measured in each of the three cochlear turns. Input-output functions for whole-nerve action potential responses to clicks and visual detection levels for early averaged evoked responses arising in the brain stem were also measured.

Descriptors :   (*STRESS(PHYSIOLOGY), NOISE), (*LABORATORY ANIMALS, THRESHOLDS(PHYSIOLOGY)), BEHAVIOR, AUDITORY PERCEPTION, EAR, RODENTS, ELECTROPHYSIOLOGY, FREQUENCY, INTENSITY, RECOVERY

Subject Categories : Stress Physiology
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE