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Related Experiment Video

Updated: Dec 12, 2025

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Characterizing upper extremity motor behavior in the first week after stroke.

Jessica Barth1, Shashwati Geed1,2, Abigail Mitchell1

  • 1MedStar National Rehabilitation Network, Washington, District of Columbia, United States of America.

Plos One
|August 11, 2020
PubMed
Summary
This summary is machine-generated.

Early after stroke, patients use their non-paretic upper extremity (UE) more, potentially hindering recovery. This overuse, alongside reduced overall UE movement, suggests early interventions are crucial for stroke motor recovery.

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Area of Science:

  • Neuroscience
  • Rehabilitation Medicine
  • Biomedical Engineering

Background:

  • Animal models show early post-lesion flux in sensorimotor function.
  • Rodent studies indicate training the less affected limb can impair recovery of the more affected limb.
  • This study investigates if similar compensatory behaviors occur in humans early after stroke.

Purpose of the Study:

  • To examine spontaneous upper extremity (UE) behaviors in stroke patients within the first week post-stroke.
  • To determine if early UE movement patterns could impede clinical motor recovery.
  • To identify distinct constructs for accurate UE motor assessment post-stroke.

Main Methods:

  • Prospective observational study of 25 stroke patients (4.5 ±1.8 days post-stroke) and 12 controls.
  • Utilized accelerometry to measure UE movement quantity and bilateral/unilateral use.
  • Assessed motor function using Upper-Extremity Fugl-Meyer (UEFM), Action Research Arm Test (ARAT), and Shoulder Abduction/ Finger Extension Test (SAFE).

Main Results:

  • Stroke patients showed reduced total paretic UE movement (44% less bilateral use) compared to controls.
  • Unilateral use of the non-paretic UE increased by 77% early after stroke.
  • Exploratory factor analysis revealed motor performance and quantity of movement as independent constructs.

Conclusions:

  • Early after stroke, movement shifts to overuse of the non-paretic UE, potentially leading to learned non-use.
  • Skill acquisition in the non-paretic limb may impede recovery of the paretic limb.
  • Accurate UE motor assessment requires evaluating both motor performance and quantity of movement for developing early, behaviorally-based stroke treatments.