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Aging and middle ear function in rhesus monkeys (Macaca mulatta).

P Torre¹, R E Lasky, C G Fowler

¹Department of Communicative Disorders, University of Wisconsin-Madison, 53706, USA.

Audiology : Official Organ of the International Society of Audiology

|January 5, 2002

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Rhesus monkeys show similar middle ear function to humans, supporting their use as a model for human auditory studies. Male monkeys exhibited higher acoustic admittance and ear canal volume than females.

Area of Science:

Auditory Science
Comparative Physiology
Primate Research

Background:

Limited data exists on middle ear function in rhesus monkeys.
Understanding rhesus monkey auditory function is crucial for their use as a biomedical model.
Previous research has not extensively detailed tympanometric parameters in this species.

Purpose of the Study:

To provide tympanometric data for rhesus monkeys (Macaca mulatta).
To assess the suitability of rhesus monkeys as a model for human peripheral auditory function.
To investigate age and sex effects on middle ear parameters in rhesus monkeys.

Main Methods:

Measurement of peak acoustic admittance (Ytm) and ear-canal volume (Vea) in adult rhesus monkeys.
Measurement of middle ear resonance frequency in adult rhesus monkeys.

Related Experiment Videos

Comparison of tympanometric data between younger and older adult monkeys, and between sexes.

Main Results:

Overall tympanometric values (Ytm, Vea, resonance frequency) in rhesus monkeys were comparable to humans, particularly human children.
Male monkeys demonstrated significantly larger peak Ytm and Vea than female monkeys, mirroring human findings.
Trends for decreased Ytm and Vea in older monkeys were observed but did not reach statistical significance.

Conclusions:

Rhesus monkeys serve as a valuable model for human peripheral auditory function.
Tympanometric data in rhesus monkeys closely resembles that of humans, especially children.
Sex, but not age, significantly influences specific middle ear parameters in rhesus monkeys.