Article Text

PDF

Cutaneous reflexes in small muscles of the hand
  1. M. R. Caccia1,
  2. A. J. McComas2,
  3. A. R. M. Upton,
  4. T. Blogg
  1. Department of Medicine (Neurology), McMaster University Medical Centre, Hamilton 16, Ontario, Canada

    Abstract

    A study has been made of the responses of motoneurones innervating small muscles of the hand to electrical and mechanical stimulation of the skin. Both excitatory and inhibitory effects could be observed in the same muscle after a single stimulus to a given area of skin. The earliest excitatory and inhibitory responses are probably mediated by group III and the smaller group II afferent nerve fibres. A later inhibition results from activity in the larger group II fibres which are connected to cutaneous mechanoreceptors, especially those in the tips of the fingers and thumb. This late inhibitory reflex may operate through the fusimotor system. The possible roles of these reflexes are discussed in relation to previous investigations in man and the cat.

    Statistics from Altmetric.com

    Footnotes

    • 1 NATO Research Fellow on leave from the C. Besta Neurological Institute, Milan.

    • 2 Member of the Canadian MRC Group in Developmental Neurobiology.

    Request permissions

    If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.