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The effects of movement velocity, mass displaced, and task certainty on associated postural adjustments made by normal and hemiplegic individuals.
  1. F B Horak,
  2. P Esselman,
  3. M E Anderson,
  4. M K Lynch

    Abstract

    The activation times for trunk and leg muscles were examined in normal and left hemiplegic subjects who raised their right arms at different velocities in self-paced or reaction time conditions. Activity in these postural muscles preceded arm displacement, and they were activated in a similar sequence during all types of rapid movements. The presence and sequencing of associated postural adjustments were more variable during slow movements.

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