Motor unit - muscle spindle interactions in active muscles of decerebrate cats

William Cameron, M. D. Binder, B. R. Botterman, R. M. Reinking, D. G. Stuart

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Single muscle spindle afferent and motor unit EMG spike trains have been recorded simultaneously during periods of spontaneous motor activity in triceps surae muscles of decerebrate cats. The approximate time course and magnitude of the motor unit contractions were extracted from the whole muscle force record by spike-triggered averaging, and the functional interactions between motor unit contractions and spindle discharge were assessed by cross-correlating their respective spike trains. We have found that both spindle group Ia and II afferents are responsive to the contractions of single motor units in the presence of spontaneous motor activity, being strongly coupled to the activity of some motor units and indifferent to the contractions of others. Moreover, the cross-correlation analysis revealed modulation of a single motor unit's discharge pattern by the input of a single Ia afferent.

Original languageEnglish (US)
Pages (from-to)55-60
Number of pages6
JournalNeuroscience Letters
Volume19
Issue number1
DOIs
StatePublished - 1980
Externally publishedYes

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Muscle Spindles
Motor Activity
Cats
Muscles

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Motor unit - muscle spindle interactions in active muscles of decerebrate cats. / Cameron, William; Binder, M. D.; Botterman, B. R.; Reinking, R. M.; Stuart, D. G.

In: Neuroscience Letters, Vol. 19, No. 1, 1980, p. 55-60.

Research output: Contribution to journalArticle

Cameron, William ; Binder, M. D. ; Botterman, B. R. ; Reinking, R. M. ; Stuart, D. G. / Motor unit - muscle spindle interactions in active muscles of decerebrate cats. In: Neuroscience Letters. 1980 ; Vol. 19, No. 1. pp. 55-60.
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