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Journal of Experimental Biology 76,85-104 (1978)
Published by Company of Biologists 1978

A Quantitative Analysis of Flagellar Movement in Echinoderm Spermatozoa

YUKIO HIRAMOTO ¹ and SHOJI A. BABA ²

¹ Biological Laboratory, Tokyo Institute of Technology, Megwo-ku, Tokyo 152, Japan
² Zoological Institute, University of Tokyo, Hongo, Tokyo 113, Japan

Computerized analyses were performed on the movement of spermatozoa recorded with a high-speed camera. These provide evidence for active bending waves over the entire length of the flagellum and a single equation for waves in all cases examined. In the equation, the angular direction of the flagellum at any distance from the base is expressed by a sine function of time plus a constant, and thus flagellar waves are ‘sine-generated’. To explain the waves a model was proposed in which the active force required to generate sliding between peripheral microtubules is propagated along and around the flagellar axoneme.

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