Relation of whole muscle contractile properties to source of innervation

Robert Foehring, G. W. Sypert, J. B. Munson

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

This work investigated the extent to which constituent proportions of fast- and slow-twitch muscle units determine whole muscle contractile properties. We employed several self- and cross-reinnervation models using synergistic homogeneous and heterogeneous muscles. By comparing the present data with previously published single-unit studies on the same animals, we confirmed that the whole muscle data provide a weighted ensemble of single-unit effects. They corroborate conclusions based upon single-unit data concerning the proportions of fast- and slow-twitch units, the degree of recovery, and the alteration of force- and speed-related properties of muscle by nerve. In particular, the shape of the whole muscle isometric twitch was a reliable indicator of the relative proportions of fast- and slow-twitch motor units in the muscle. The half-rise time was an indicator of the presence or absence of fast units, and the half-relaxation time was an indicator of the presence of slow units.

Original languageEnglish (US)
Pages (from-to)366-373
Number of pages8
JournalExperimental Neurology
Volume101
Issue number3
DOIs
StatePublished - Jan 1 1988
Externally publishedYes

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Muscles

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)
  • Neurology

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Relation of whole muscle contractile properties to source of innervation. / Foehring, Robert; Sypert, G. W.; Munson, J. B.

In: Experimental Neurology, Vol. 101, No. 3, 01.01.1988, p. 366-373.

Research output: Contribution to journalArticle

Foehring, Robert ; Sypert, G. W. ; Munson, J. B. / Relation of whole muscle contractile properties to source of innervation. In: Experimental Neurology. 1988 ; Vol. 101, No. 3. pp. 366-373.
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