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Correlation of the dynamic behaviour of deefferented primary muscle spindle endings with their static behaviour

Summary

20 deefferented primary muscle spindle endings, 8 afferents from the extensor digitorum longus muscle (EDL) and 12 from the tibialis anterior muscle (TA), were investigated in 12 anesthetized cats. Dynamic responses of muscle spindles to ramp stretches were correlated with their static responses. The variation in the static and dynamic behaviour was found to be interdependent. The correlation coefficients were higher for EDL spindles than for TA spindles. The correlation coefficients depended upon the definition of the dynamic responses.

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Preliminary reports of some of the results were given at the 40th Meeting of the Deutsche Physiologische Gesellschaft, Düsseldorf (Meyer-Lohmannet al., 1972) and at the Muscle Spindle Symposium of the Anatomical Society of Great Britain and Ireland, April 4–6, 1974, at the University of Durham (Henatschet al., 1974).

Supported by grants from the Deutsche Forschungsgemeinschaft (Schwerpunktprogramm “Rezeptorphysiologie” and SFB 33: „Nervensystem und biologische Information”, Göttingen).

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Windhorst, U., Meyer-Lohmann, J. & Schmidt, J. Correlation of the dynamic behaviour of deefferented primary muscle spindle endings with their static behaviour. Pflugers Arch. 357, 113–122 (1975). https://doi.org/10.1007/BF00584549

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Key words

  • Primary Muscles Spindle Endings
  • Static and Dynamic Behaviour