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Recruitment Patterns of Intrafusal and Extrafusal Fibres in Mice During Prolonged Swimming

  • N. Fujitsuka
  • A. Yoshimura
  • Y. Shimomura
  • T. Murakami
  • K. Kawakami
  • Y. Khobu
  • C. Fujitsuka

Abstract

Though recruitment patterns of fast and slow extrafusal fibres in exercise are well established (Armstrong, Saubert, Sembrovich, Shepherd & Gollnick, 1974), there have been no reports to date regarding the recruitment of different intrafusal fibres of mammalian muscle spindles during voluntary movement. We have used glycogen depletion during prolonged swimming to investigate recruitment patterns of the three intrafusal fibre types in mice. The degree of glycogen depletion was estimated by two methods, visual inspection (VI) and our newly developed optical scanning (OS) of periodic acid Schiff (PAS)-stained sections. Fibre typing was done by combining morphological, histochemical, and immunohistochemical characteristics, and we compared the results for intrafusal and extrafusal fibres.

Keywords

Recruitment Pattern Glycogen Depletion Glycogen Concentration Intrafusal Fibre Nuclear Chain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • N. Fujitsuka
    • 1
  • A. Yoshimura
    • 1
  • Y. Shimomura
    • 1
  • T. Murakami
    • 1
  • K. Kawakami
    • 1
  • Y. Khobu
    • 1
  • C. Fujitsuka
    • 1
  1. 1.Laboratory of BioscienceNagoya Institute of TechnologyNagoya 466Japan

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