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Related Experiment Videos

Computerized measurement of motor performance after stroke

S C Cramer1, G Nelles, J D Schaechter

  • 1Department of Neurology, Massachusetts General Hospital, Boston, USA. cramers@u.washington.edu

Stroke
|November 22, 1997
PubMed
Summary

A new computerized dynamometer accurately measures hand motor function in stroke survivors, providing a permanent, sensitive record of recovery. This tool offers a continuous scale for detailed motor deficit assessment.

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Area of Science:

  • Neurology
  • Rehabilitation Medicine
  • Biomedical Engineering

Background:

  • Traditional stroke scales offer limited, ordinal data on motor function.
  • There is a need for sensitive, permanent methods to track stroke recovery.
  • Computerized tools can detect subtle changes in neurological status.

Purpose of the Study:

  • To develop and evaluate a computerized dynamometer for assessing hand motor function in stroke patients.
  • To compare the dynamometer's measurements with established stroke scales.
  • To determine the reliability of the new measurement tool.

Main Methods:

  • A computerized dynamometer was developed to measure sustained squeezing, repetitive squeezing, and index finger tapping.
  • Twenty-three stroke subjects and 12 elderly controls performed motor tasks.

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  • Fugl-Meyer and National Institutes of Health stroke scales were administered for comparison.

    • Main Results:

    • Stroke subjects exhibited significantly weaker grip strength and slower finger tapping compared to controls.
    • Dynamometer data showed strong correlations with Fugl-Meyer scores, indicating sensitivity to motor deficits.
    • Measurements demonstrated excellent interrater and intrarater reliability.

    Conclusions:

    • The computerized dynamometer effectively quantifies motor deficits in stroke patients.
    • This tool provides a continuous, permanent, and reliable measure of hand motor performance.
    • It offers a valuable method for studying and monitoring stroke recovery.