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

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Alpha and Gamma Motor Systems

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.

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© 1995 Springer Science+Business Media New York

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Halliday, D.M., Kakuda, N., Wessberg, J., Vallbo, Å.B., Conway, B.A., Rosenberg, J.R. (1995). Correlation between Ia Afferent Discharges, EMG and Torque During Steady Isometric Contraction of Human Finger Muscles. In: Taylor, A., Gladden, M.H., Durbaba, R. (eds) Alpha and Gamma Motor Systems. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-1935-5_120

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  • DOI: https://doi.org/10.1007/978-1-4615-1935-5_120

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-5793-3

  • Online ISBN: 978-1-4615-1935-5

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