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The effect of chain fibre ‘driving’ on the length sensitivity of primary sensory endings in the tenuissimus, peroneus tertius and soleus muscles

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The Muscle Spindle

Abstract

Direct observation of cat muscle spindles has shown that driving of primary endings (one afferent spike per γ efferent impulse constitutes 1:1 driving) by static γ axons is due to mechanical excitation of the small spirals of the primary sensory ending by oscillating nuclear chain fibres (Boyd et al., 1977). Driving has now been studied in 25 tenuissimus spindles and two from each of the peroneus tertius and soleus muscles to assess the generality of the phenomenon.

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References

  • Boyd, I.A., Gladden, M.H., McWilliam, P.N. & Ward, J. (1977). Control of dynamic and static nuclear bag fibres and nuclear chain fibres by gamma and beta axons in isolated cat muscle spindles. J. Physiol., Lond., 265. 133–162.

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  • Boyd, I.A., Gladden, M.H. & Ward, J. (1983). Suppression of the length sensitivity of primary sensory endings by nuclear chain fibres in cat muscle spindles. J. Physiol., Lond., 339, 59–60P.

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  • Dutia, M.B., Murray-Smith, D.J., Rosenberg, J.R. & Wilson, R. (1977). The dependence of ‘driving’ of Ia axons on muscle length and fusimotor stimulation frequency. J. Physiol., Lond., 273, 30–31P.

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Authors
  1. I. A. Boyd
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  2. P. R. Murphy
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  3. C. Mann
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Editor information

Editors and Affiliations

  1. Institute of Physiology, The University, G12 8QQ, Glasgow, UK

    I. A. Boyd (Buchanan Professor of Physiology) & M. H. Gladden (Senior Lecturer in Physiology) (Buchanan Professor of Physiology) &  (Senior Lecturer in Physiology)

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© 1985 I. A. Boyd and M. H. Gladden

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Boyd, I.A., Murphy, P.R., Mann, C. (1985). The effect of chain fibre ‘driving’ on the length sensitivity of primary sensory endings in the tenuissimus, peroneus tertius and soleus muscles. In: Boyd, I.A., Gladden, M.H. (eds) The Muscle Spindle. Palgrave Macmillan, London. https://doi.org/10.1007/978-1-349-07695-6_28

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