Accession Number : AD0712983

Title :   COCHLEAR MICROPHONIC SENSITIVITY IN THE RAT AS A FUNCTION OF AGE.

Descriptive Note : Preliminary rept.,

Corporate Author : HUMAN ENGINEERING LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : Price,G. Richard

Report Date : JUL 1970

Pagination or Media Count : 11

Abstract : The report evaluates the suitability of the rat species for studying the effect of ageing on the ear. Cochlear microphonic (CM) sensitivity was measured at frequencies from 0.1- to 20-kHz in male albino rats (Wistar) 1 month, 13 months, and 18 months old. The two youngest groups had equally sensitive ears; but the ears of the oldest group showed large losses in CM sensitivity at all frequencies. If the rat ear is to be used to study the effect of ageing, special measures are needed with respect to middle-ear infection. (Author)

Descriptors :   (*AUDITORY PERCEPTION, DETERIORATION), (*EAR, SENSITIVITY), (*AGING(PHYSIOLOGY), SCIENTIFIC RESEARCH), LABORATORY ANIMALS, RATS, AUDITORY SIGNALS, FREQUENCY, INFECTIONS, PERFORMANCE(HUMAN)

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE