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Reflex responses of paraspinal muscles to tapping
  1. M R Dimitrijevic,
  2. M R Gregoric,
  3. A M Sherwood,
  4. W A Spencer
  1. Department of Clinical Neurophysiology, The Institute for Rehabilitation and Research, Baylor College of Medicine, Houston, Texas
  2. Department of Rehabilitation, Baylor College of Medicine, Houston, Texas
  3. The Institute of Clinical Neurophysiology, School of Medicine, University of Ljubljana, Ljubljana, Yugoslavia


    Erector spinae reflex studies in healthy subjects revealed two responses: a 12·0±1·6 ms latency, oligosynaptic response, and a 30 to 50 ms latency response with polysynaptic reflex characteristics. There was a silent period after the first and second responses. The effect of limb position, trunk, neck, postural changes, Jendrassik manoeuvre and vibration on both responses were also evaluated.

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