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Practice effects on the less-affected upper extremity after stroke.

P S Pohl1, C J Winstein

  • 1Department of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, USA.

Archives of Physical Medicine and Rehabilitation
|June 23, 1999
PubMed
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Adults with stroke can improve upper extremity (UE) aiming task performance with practice. However, stroke patients demonstrated less improvement in complex conditions compared to controls.

Area of Science:

  • Neurorehabilitation
  • Motor Control
  • Human Performance

Background:

  • Stroke survivors often experience motor impairments affecting the upper extremity (UE).
  • Understanding motor learning and adaptation in stroke patients is crucial for effective rehabilitation.
  • The less-affected UE may retain some motor plasticity post-stroke.

Purpose of the Study:

  • To investigate if adults post-stroke improve aiming task performance with practice using their less-affected UE.
  • To compare practice-related improvements in stroke patients versus non-disabled controls, particularly in complex task conditions.

Main Methods:

  • A human performance laboratory setting was used.
  • Ten adults with unilateral stroke and ten age-matched controls practiced an aiming task.

Related Experiment Videos

  • Movement time (MT), peak velocity, and trajectory temporal phases were measured for the less-affected UE.

    • Main Results:

    • Stroke patients exhibited longer MTs than controls, but all participants improved MT with practice.
    • Practice reduced the absolute time in temporal phases of the trajectory, without altering relative timing.
    • Peak velocity increased with practice only in the easier condition.

    Conclusions:

    • Adults with stroke can enhance motor performance of their less-affected UE through practice.
    • Further research is required to determine the long-term effects and generalizability of these practice-induced improvements.