[Relation between action potential and tension in striated muscle]

Bergmans, J.;Maréchal, Georges
(1960) Archives Internationales de Physiologie et de Biochimie — Vol. 68, n° 2, p. 377-379 (1960)

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Authors
  • Bergmans, J.
    Co-first author
  • Maréchal, Georgesorcid-logoUCLouvain
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Abstract
The maximal isometric tension (force par unit muscle cross-section) of a curarized frog sartorius evolves into two distinct phases during a long tetanus. During the first phase, the extracellular action potential AP (belly-tendon derivation) the AP decreases by 50%, whilst the tension decreases little; during the second, the tension decreases rapidly decreases proportionally to the AP. In conclusion, the muscular fatigue which occurs as a result of prolonged tetanization seems to originate at the level of the membrane, in a deficiency of the electrical processes which would become powerless to excite again the contractile mechanism.

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Bergmans, J., & Maréchal, G. (1960). [Relation between action potential and tension in striated muscle]. Archives Internationales de Physiologie et de Biochimie, 68(2), 377-379. https://hdl.handle.net/2078.5/214632 (Original work published 1960)