Correlation between Ia Afferent Discharges, EMG and Torque During Steady Isometric Contraction of Human Finger Muscles

  • D. M. Halliday
  • N. Kakuda
  • J. Wessberg
  • Å. B. Vallbo
  • B. A. Conway
  • J. R. Rosenberg

Abstract

Muscle spindle discharge in the cat is sensitive to the mechanical activity of anatomically close motor units (e.g. Binder & Stuart, 1980; Conway, Halliday & Rosenberg, 1993). In man similar have been demonstrated by electrical stimulation of skeletomotor axons (McKeon & Burke, 1983). However, studies of voluntary contractions in man have failed to reveal effects of this nature when single afferent firing was correlated with gross surface EMG in leg muscles (Gandevia, Burke & McKeon, 1986). Here we examine this problem in the case of finger extensor muscles during low force voluntary isometric contractions.

Keywords

Fatigue Depression Torque Coherence Neurol 

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References

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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • D. M. Halliday
    • 2
  • N. Kakuda
    • 1
  • J. Wessberg
    • 1
  • Å. B. Vallbo
    • 1
  • B. A. Conway
    • 3
  • J. R. Rosenberg
    • 2
  1. 1.Department of PhysiologyGöteborg UniversityGöteborgSweden
  2. 2.Department of PhysiologyGlasgow UniversityGlasgowUK
  3. 3.Bioengineering UnitStrathclyde UniversityGlasgowUK

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