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The co-ordination of the rhythmical fin movements of dogfish

Published online by Cambridge University Press:  11 May 2009

B. L. Roberts
Affiliation:
Department of Zoology, University of Cambridgecor1corresp
*

Extract

The muscle fibres of the radial muscles of the unpaired fins of dogfish can be divided into two populations—an outer group of red muscle fibres which are smaller and fewer than the inner white muscle fibres and which differ in structure, number of nuclei and pattern of innervation. Two types of potential were detected in the two muscle systems when recordings were made with implanted electrodes during movements of the fins. The red muscle fibres were associated with small, slow junctional potentials which changed in amplitude when the activity of the system was altered.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 1969

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