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Related Experiment Video

Updated: Mar 16, 2026

Author Spotlight: Enhancing Upper Limb Rehabilitation in Stroke Patients Through Advanced Robotic and Neuromodulation Technologies
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Upper Limb Obstacle Avoidance Behavior in Individuals With Stroke.

Melanie C Baniña1,2, Aditi A Mullick1,2, Bradford J McFadyen3,4

  • 11 McGill University, Montreal, Quebec, Canada.

Neurorehabilitation and Neural Repair
|August 21, 2016
PubMed
Summary
This summary is machine-generated.

Individuals with post-stroke hemiparesis struggle with complex arm movements, impacting daily use. Evaluating obstacle avoidance in clinical practice can reveal deficits and improve arm function.

Keywords:
armmotor controlreachingrecovery

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Area of Science:

  • Neuroscience
  • Rehabilitation Medicine
  • Biomechanics

Background:

  • Upper limb (UL) poststroke hemiparesis often results in chronic disability.
  • Many patients do not fully utilize their arm in daily tasks despite clinical recovery.
  • Reduced arm use may stem from deficits in complex movement performance beyond standard clinical assessments.

Purpose of the Study:

  • To compare complex corrective movement strategies between post-stroke individuals and controls when avoiding obstacles.
  • To identify specific motor control differences during obstacle avoidance tasks.

Main Methods:

  • Participants reached for an object in a 3D virtual environment, with a sliding door obstructing the path in random trials.
  • Success was defined as reaching the object without arm or hand contact with the door.
  • Hemiparetic arms (stroke group) and dominant arms (controls) were assessed.

Main Results:

  • Stroke survivors had significantly lower success rates (12%) in avoiding the obstacle compared to controls (42%).
  • Subjects with stroke initiated corrective movements later and with a reduced margin for error.
  • Stroke survivors utilized more trunk movement and less elbow movement compared to controls during obstructed reaching.

Conclusions:

  • Complex task evaluation, specifically obstacle avoidance, reveals arm movement deficits in post-stroke individuals.
  • Deficits in higher-order motor functions like obstacle avoidance may reduce actual arm use.
  • Incorporating obstacle avoidance assessments into routine clinical practice is recommended for individuals with mild-to-moderate hemiparesis.