Advertisement

Security of driving of Ia afferents by vibration that simultaneously elicits a tonic vibration reflex

  • F. J. Clark
  • P. B. C. Matthews
  • R. B. Muir

Summary

Experiments were performed in the decerebrate cat to test how well the soleus Ia fibres are driven 1:1 by vibration (150 Hz, 50μm pulses, combined with a 1 mm stretch) in the presence of a tonic vibration reflex, with particular reference as to whether any phasic Ia ‘misbehaviour’ could be responsible for the tremor seen in the reflex contraction. In order to keep the reflex arc intact the unitary recording was performed by means of a capillary glass micro-electrode inserted into the soleus nerve. In general, driving proved to be remarkably secure in spite of the unloading and any other effects of the reflex contraction, and it is concluded that the tremor in the reflex tension, recorded isometrically, is not attributable to oscillatory stretch reflex activity.

Keywords

Soleus Muscle Motor Unit Firing Golgi Tendon Organ Reflex Contraction Discrete Pulse 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Brown, M. C., Engberg, I. and Matthews, P. B. C. (1967). The relative sensitivity to vibration of muscle receptors of the cat, J. Physiol., Lond., 192, 773–800CrossRefGoogle Scholar
  2. Burke, D., Hagbarth, K.-E., Löfstedt, L. and Wallin, B. G. (1976). The responses of human muscle spindle endings to vibration during isometric contraction, J. Physiol., Lond., 261, 695–711CrossRefGoogle Scholar
  3. Clark, F. J., Matthews, P. B. C. and Muir, R. B. (1981a). Response of soleus Ia afferents to vibration in the presence of the tonic vibration reflex in the decerebrate cat, J. Physiol., Lond., to be publishedGoogle Scholar
  4. Clark, F. J., Matthews, P. B. C. and Muir, R. B. (1981b). Motor unit firing and its relation to tremor in the tonic vibration reflex of the decerebrate cat, J. Physiol., Lond., to be publishedGoogle Scholar
  5. Cussons, P. D., Matthews, P. B. C. and Muir, R. B. (1979). Tremor in the tension developed isometrically by soleus during the tonic vibration reflex in the decerebrate cat, J. Physiol., Lond., 292, 35–57CrossRefGoogle Scholar
  6. Jack, J. J. B. and Roberts, R. C. (1978). The role of muscle spindle afferents in stretch and vibration reflexes of the soleus muscle of the decerebrate cat, Brain Res., 146, 366–372CrossRefGoogle Scholar
  7. Kanda, K. and Rymer, W. Z. (1977). An estimate of the secondary spindle receptor afferent contribution to the stretch reflex in extensor muscles of the decerebrate cat, J. Physiol., Lond., 264, 63–87CrossRefGoogle Scholar
  8. McGrath, G. J. and Matthews, P. B. C. (1973). Evidence from the use of vibration during procaine nerve block that the spindle group II fibres contribute excitation to the tonic stretch reflex of the decerebrate cat, J. Physiol., Lond., 235, 371–408CrossRefGoogle Scholar
  9. Matthews, P. B. C. (1966). The reflex excitation of the soleus muscle of the decerebrate cat caused by vibration applied to its tendon, J. Physiol., Lond., 184, 450–472CrossRefGoogle Scholar

Copyright information

© The contributors 1981

Authors and Affiliations

  • F. J. Clark
    • 1
  • P. B. C. Matthews
    • 1
  • R. B. Muir
    • 1
  1. 1.University Laboratory of PhysiologyOxfordUK

Personalised recommendations