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Related Experiment Videos

Improved myoelectric prosthesis control accomplished using multiple nerve transfers.

John B Hijjawi1, Todd A Kuiken, Robert D Lipschutz

  • 1Chicago, Ill. From the Department of Surgery, Division of Plastic Surgery, and Department of Physical Medicine and Rehabilitation, Feinberg School of Medicine, Northwestern University, and the Neural Engineering Center for Artificial Limbs, Rehabilitation Institute of Chicago.

Plastic and Reconstructive Surgery
|November 15, 2006
PubMed
Summary

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Assessing Functional Changes With the Integration of Wrist Flexion Into a Myoelectric Prosthesis.

IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society·2025

This study demonstrates a novel nerve transfer technique for improved myoelectric prosthesis control in shoulder-level disarticulation amputees. The innovative bioamplification method significantly enhances prosthetic function and user performance.

Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Rehabilitation Medicine

Background:

  • Shoulder-level disarticulation prostheses present significant control challenges due to the need for sequential joint actuation.
  • Amputees struggle to coordinate multiple prosthetic components, impacting daily function.

Observation:

  • A patient with bilateral humeral disarticulations received a novel nerve transfer procedure.
  • Peripheral nerves (median, radial, ulnar, musculocutaneous) were rerouted to pectoral muscle segments to act as bioamplifiers.
  • Brain signals for limb movement were translated into muscle contractions detected by electromyography (EMG).

Findings:

  • Three out of four nerve transfers were successful, with one yielding dual-control muscle segments.
  • Prosthetic control and performance, measured by the "box-and-blocks" test, improved by 246% compared to the previous device.

Related Experiment Videos

  • This technique creates a new neural interface for myoelectric prostheses without implantable devices.

    • Implications:

    • Nerve transfers to small muscle segments offer a viable strategy for enhancing prosthetic control.
    • This approach utilizes standard surgical techniques, making it potentially more accessible.
    • The findings pave the way for more intuitive and functional upper-limb prosthetics.