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facilitation effect of intense muscle contraction

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  • facilitation effect of intense muscle contraction

    Brief, intense muscular effort produces a long-lasting facilitation
    of the motoneuron pool that was originally described in animal studies
    (post-tetanic potentiation) and can be demonstrated in human subjects,
    as Robert Newton has suggested. Sometimes it is called the aftercontraction
    effect (Craske & Craske, Journal of Motor Behavior, 18, 117-145, 1986) but
    it is also often called post-contraction. Much of the literature is older
    (e.g., Sapirstein, M.R. "A study of after-contraction", Am J Physiology,
    119, 549-556, 1957). I conducted an experiment several years ago
    (unpublished) and found that a preliminary maximal isometric effort
    facilitated peak torque in a subsequent isokinetic contraction. Other
    interesting studies include Vandervoort et al (Exp Neurology, 81, 141-152,
    1983) and Zigler ("The Neurophysiology of post-contraction" Psych review,
    51,315-325, 1944).

    Gary Kamen
    Department of Physical Therapy
    Boston University