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Computer-controlled 22-channel stimulator for limb movement.

R Davis1, R Eckhouse, J F Patrick

  • 1Veterans Administration Medical and Regional Office Center, Togus, ME 04330.

Acta Neurochirurgica. Supplementum
|January 1, 1987
PubMed
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This study modified a hearing prosthesis into a 22-channel neural stimulator for functional electrical stimulation (FES). Researchers successfully demonstrated nerve activation in rabbits and gathered human nerve data for paraplegic applications.

Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Rehabilitation Technology

Background:

  • Functional electrical stimulation (FES) offers potential for restoring movement in individuals with paralysis.
  • Existing neural stimulators require further development for precise nerve activation and control.

Purpose of the Study:

  • To adapt a multichannel implantable hearing prosthesis into a 22-channel neural stimulator for FES applications.
  • To evaluate the stimulator's efficacy in activating peripheral nerves in animal models and humans.
  • To gather data for designing a wearable control unit for paraplegic ambulation.

Main Methods:

  • Modification of the Nucleus multichannel hearing prosthesis into a 22-channel neural stimulator.
  • Programming individual channel parameters (amplitude, width, frequency) for precise nerve activation.

Related Experiment Videos

  • Stimulation of rabbit sciatic nerve branches to induce joint movements.
  • Acquisition of nerve stimulation data (threshold, maximal levels, diameter) from human subjects with lower extremity amputations.

    • Main Results:

    • Successful activation of single and multiple nerves in rabbits, producing coordinated limb movements.
    • Demonstrated suitability of spiral (helix) electrodes for nerve stimulation.
    • Collected crucial human peripheral nerve data for designing FES systems for paraplegia.
    • Completed the design of a wearable ambulation unit to control the 22-channel stimulator.

    Conclusions:

    • The modified hearing prosthesis serves as a versatile 22-channel neural stimulator for FES.
    • The system shows promise for restoring ambulation in paraplegic individuals.
    • Further research and development are warranted for clinical translation of this FES technology.