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Related Experiment Videos

The Rancho EMG analyzer: a computerized system for gait analysis

J Perry1, E L Bontrager, R A Bogey

  • 1Rancho Los Amigos Medical Center, Downey, CA 90242.

Journal of Biomedical Engineering
|November 1, 1993
PubMed
Summary
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This computer system accurately analyzes lower extremity EMG patterns during gait using footswitches and electrodes. It provides clinically relevant reports, achieving 86% accuracy compared to expert visual analysis.

Area of Science:

  • Biomedical Engineering
  • Clinical Biomechanics
  • Neuromuscular Physiology

Background:

  • Electromyography (EMG) analysis is crucial for understanding lower extremity function during gait.
  • Accurate and objective EMG interpretation can be challenging, requiring specialized systems.
  • Existing methods may lack detailed phase-specific analysis and standardized reporting.

Purpose of the Study:

  • To describe a computer system for accurate EMG pattern definition in lower extremities during gait.
  • To validate the system's accuracy against expert visual analysis.
  • To provide a clinically relevant reporting tool for gait analysis.

Main Methods:

  • Utilized footswitches to define gait cycle phases and temporal relationships.
  • Employed fine-wire or surface electrodes to capture EMG signals.

Related Experiment Videos

  • Developed a normal database using time-adjusted mean profiles (TAMP).
  • Generated Intensity Filtered Average (IFA) graphs and textual reports with descriptive qualifiers.

    • Main Results:

    • The system achieved 86% accuracy in analyzing 428 muscle tests compared to expert visual analysis.
    • Intensity Filtered Average (IFA) of EMG signals was graphically represented per stride.
    • Clinically relevant textual reports were generated using descriptive qualifiers.

    Conclusions:

    • The described computer system accurately defines lower extremity EMG patterns during gait.
    • The system offers a reliable and objective tool for clinical gait analysis.
    • Recommendations for system use and future improvements were provided.