Voluntary and reflex control of human back muscles during induced pain.

  title={Voluntary and reflex control of human back muscles during induced pain.},
  author={Milan Zedka and Arthur Prochazka and Barry Knight and D M Gillard and M J Gauthier},
  journal={The Journal of physiology},
  volume={520 Pt 2},
1. Back pain is known to change motor patterns of the trunk. The purpose of this study was to examine the motor output of the erector spinae (ES) muscles during pain in the lumbar region. First, their voluntary activation was assessed during flexion and re-extension of the trunk. Second, effects of cutaneous and muscle pain on the ES stretch reflex were measured, since increased stretch reflex gain has been suggested to underlie increased muscle tone in painful muscles. 2. The trunk movement… CONTINUE READING
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