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Mechanical properties of Pinna adductor muscle

Published online by Cambridge University Press:  11 May 2009

B. C. Abbott  and
J. Lowy
B. C. Abbott
Affiliation:
From the Plymouth Laboratory and Department of Zoology, University of Belfast
J. Lowy
Affiliation:
From the Plymouth Laboratory and Department of Zoology, University of Belfast
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Extract

It is well known that the smooth adductors of lamellibranch molluscs can hold the shells closed against the tension exerted by the elastic hinge ligament for prolonged periods without visible signs of fatigue. Two opposing hypotheses have been put forward to explain this phenomenon. One postulates that tonic contraction is a tetanic phenomenon and that the economy of lamellibranch smooth muscles is due to their slow speed of relaxation (Ritchie, 1928); whilst the other proposes the existence of a ‘catch mechanism’ which enables tension to be maintained without expenditure of energy, so that no excitation is needed during tonic contraction (Jordan, 1938).

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 35 , Issue 3 , October 1956 , pp. 521 - 530
Copyright
Copyright © Marine Biological Association of the United Kingdom 1956

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References

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