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On the structure of corpuscular proprioceptive endings in sharks

Published online by Cambridge University Press:  11 May 2009

Q. Bone  and
A. D. Chubb
Q. Bone
Affiliation:
The Laboratory, Marine Biological Association, Citadel Hill, Plymouth
A. D. Chubb
Affiliation:
The Laboratory, Marine Biological Association, Citadel Hill, Plymouth
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Extract

Proprioceptive endings associated with the locomotor musculature are apparently extremely uncommon in fishes. Muscle spindles are absent, and only in elasmobranchs have sensory endings of two types been recognized as proprioceptive. One of these, found in sharks, is the coiled corpuscular ending first observed by Wunderer (1908) at the bases of the fins in various species. This type of ending also occurs sub-cutaneously along the body, superficial to the myocommata (Bone, 1964). Lowenstein (1956) examined the responses of the endings associated with the fin bases, and showed that they were slowly adapting mechanoreceptors, functioning as second order proprioceptors since as the fin was bent, so the connective tissue amongst which the endings lie was stretched or compressed, and the receptor discharged.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 56 , Issue 4 , November 1976 , pp. 925 - 928
Copyright
Copyright © Marine Biological Association of the United Kingdom 1976

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