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Updated: Mar 2, 2026

A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers
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A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers

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A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers.

Catherine E Lang1, Kimberly J Waddell2, Joseph W Klaesner3

  • 1Program in Physical Therapy, Washington University School of Medicine; Program in Occupational Therapy, Washington University School of Medicine; Department of Neurology, Washington University School of Medicine; langc@wustl.edu.

Journal of Visualized Experiments : Jove
|May 19, 2017
PubMed
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Wearable accelerometers measure daily upper limb activity after neurological conditions. This method provides clinically relevant data to assess daily function and guide rehabilitation interventions for stroke patients.

Area of Science:

  • Neuroscience
  • Rehabilitation Medicine
  • Biomedical Engineering

Background:

  • Improving daily life function is a primary goal of rehabilitation after stroke and neurological conditions.
  • Measuring real-world activity is crucial, moving beyond clinical assessments.
  • Wearable accelerometers offer a novel method to quantify daily limb movement.

Purpose of the Study:

  • To describe a methodology for collecting and processing accelerometry data for clinical relevance.
  • To establish the utility of accelerometry in assessing upper limb activity in daily life.
  • To provide a tool for evaluating upper limb dysfunction and intervention effectiveness.

Main Methods:

  • Participants wore two wrist accelerometers for at least 24 hours.
  • Data processing yielded four key variables: hours of use, use ratio, magnitude ratio, and bilateral magnitude.

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  • Density plots were used to visualize 24-hour upper limb activity patterns.

    • Main Results:

    • The developed methodology produced consistent and clinically relevant data on upper limb activity.
    • Density plots effectively represented daily movement patterns.
    • The data demonstrated high consistency in neurologically intact adults, establishing a baseline for comparison.

    Conclusions:

    • This accelerometry methodology provides a reliable tool to assess daily upper limb performance.
    • It can identify deviations from normal function, aiding in the evaluation of neurological conditions.
    • The approach is suitable for research and has potential for clinical neurorehabilitation practice.