title: The effects of movement velocity, mass displaced, and task certainty on associated postural adjustments made by normal and hemiplegic individuals.
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.
mesh_terms: D000328:Adult; D000368:Aged; D002544:Cerebral Infarction / Q000503:physiopathology; D004576:Electromyography; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006429:Hemiplegia / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009048:Motor Skills / Q000502:physiology*; D009132:Muscles / Q000294:innervation*; D009469:Neuromuscular Junction / Q000503:physiopathology; D004856:Postural Balance; D011187:Posture; D011597:Psychomotor Performance / Q000502:physiology; D011930:Reaction Time / Q000502:physiology