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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Ossicular differentiation of airborne and seismic stimuli in the Cape golden mole (Chrysochloris asiatica)
Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology, Volume 192, No. 3, Year 2006
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Description
Comparison between the middle ear anatomy of the Cape golden mole (Chrysochloris asiatica), which exhibits a club-shaped malleus head, and the Desert golden mole (Eremitalpa granti), with a ball-shaped malleus head, suggests differences in sensitivity to airborne sound. Scanning laser Doppler vibrometric measurements of the ossicular behavior in response to both vibration and airborne sound were made in C. asiatica. Two distinct vibrational modes were observed. In response to low-frequency vibration (70-200 Hz), the malleus oscillates about the ligament of the short process of the incus, whereas in response to high-frequency airborne sound (1-6 kHz) the ossicular chain rotates about the long axis of malleus. It is proposed that the club-shaped malleus head in C. asiatica constitutes an adaptation towards bimodal hearing - sensitivity to substrate vibrations and airborne sound. Possible functional differences between these two middle ear types are discussed. © Springer-Verlag 2005.
Authors & Co-Authors
Willi, U. B.
United States, Los Angeles
University of California, Los Angeles
Bronner, Gary N.
South Africa, Cape Town
University of Cape Town
Narins, Peter M.
United States, Los Angeles
University of California, Los Angeles
Statistics
Citations: 29
Authors: 3
Affiliations: 2
Identifiers
Doi:
10.1007/s00359-005-0070-9
ISSN:
03407594