Pflügers Archiv

, Volume 379, Issue 1, pp 117–119 | Cite as

Evidence for an action of sodium ions in the activation of contraction of twitch muscle fibre

  • J. Caillé
  • M. Ildefonse
  • O. Rougier
Excitable Tissues and Central Nervous Physiology Letters and Notes

Abstract

Simultaneous records in current clamp conditions of potential and of contraction of frog skeletal twitch muscle fibre have shown that a part of the contraction directly depends on the intervention of sodium ions (increase in presence of veratrine, decrease in lithium Ringer). The results confirm previous voltage clamp data and suggest a mechanism of sodium induced calcium release.

Key words

Frog twitch muscle Sodium ions Excitation contraction coupling 

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References

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Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • J. Caillé
    • 1
  • M. Ildefonse
    • 1
  • O. Rougier
    • 1
  1. 1.Laboratoire de Physiologie des Eléments ExcitablesUniversité Claude BernardVilleurbanneFrance

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