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Related Experiment Videos

Proportional myoelectric hand control: an evaluation.

H H Sears1, J Shaperman

  • 1Motion Control, Division of IOMED, Inc., Salt Lake City, UT 84119.

American Journal of Physical Medicine & Rehabilitation
|February 1, 1991
PubMed
Summary

Proportional myoelectric control offers superior prosthetic hand function compared to digital systems. Patients reported better speed, force control, and reduced effort with proportional myoelectric hands.

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Area of Science:

  • Biomedical Engineering
  • Rehabilitation Technology
  • Prosthetics

Background:

  • Myoelectric control systems enhance prosthetic limb functionality.
  • Proportional myoelectric control offers nuanced grip adjustments.
  • Digital myoelectric control provides binary on/off functionality.

Purpose of the Study:

  • To evaluate patient satisfaction with proportional myoelectric prosthetic hands.
  • To compare proportional myoelectric control with digital and body-powered devices.
  • To assess user-perceived benefits in speed, force, effort, and cosmesis.

Main Methods:

  • A survey of 33 patients using proportional myoelectric hands.
  • Patients rated performance on a 5-level scale across various functional and aesthetic parameters.

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  • Statistical comparison of ratings based on prior prosthetic experience (digital myoelectric, body-powered, none).

    • Main Results:

    • Patients with prior digital myoelectric hand experience reported significantly higher overall satisfaction.
    • Proportional control was especially favored for quickness, speed/force regulation, and reduced effort.
    • Former body-powered device users noted significant improvements in speed/force control and cosmesis.

    Conclusions:

    • Proportional myoelectric control demonstrates significant advantages over digital myoelectric systems.
    • User feedback indicates enhanced functional performance and cosmetic appeal.
    • This technology represents a substantial advancement for amputees seeking intuitive prosthetic hand control.