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Proceedings Paper

Nonlinear dynamical motion of cellular structures in the cochlea
Author(s): Conor Heneghan; Malvin C. Teich; Shyam M. Khanna; Mats Ulfendahl
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Paper Abstract

The time course of the velocity of vibration was measured in individual sensory cells (outer hair cells and Hensen's cells from the third and fourth turns of a guinea-pig temporal-bone preparation) for a variety of applied acoustic stimuli. The methods of preparation and interferometric measurement have been described earlier. To observe the cell's response for a continuous and large range of acoustic intensities, an amplitude modulated tone with fixed modulation characteristics and a wide range of carrier frequencies fc was used. The peak acoustic intensities of the applied tones were in excess of 90 dB:re .0002 dynes/cm2, which is at the high intensity end of the hearing range of most mammals. A spectrogram was used to analyze the velocity response of the cell. This is a 3D representation that exhibits the time evolution of the amplitudes of all of the spectral components in the response.

Paper Details

Date Published: 5 November 1993
PDF: 15 pages
Proc. SPIE 2036, Chaos in Biology and Medicine, (5 November 1993); doi: 10.1117/12.162711
Show Author Affiliations
Conor Heneghan, Columbia Univ. (United States)
Malvin C. Teich, Columbia Univ. (United States)
Shyam M. Khanna, Columbia College of Physicians and Surgeons (United States)
Mats Ulfendahl, Karolinska Institutet (Sweden)

Published in SPIE Proceedings Vol. 2036:
Chaos in Biology and Medicine
William L. Ditto, Editor(s)

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