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Updated: Jun 20, 2026
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The Muscle Cuff Regenerative Peripheral Nerve Interface for the Amplification of Intact Peripheral Nerve Signals
Published on: January 13, 2022
Stimulation stability and selectivity of chronically implanted multicontact nerve cuff electrodes in the human upper
Katharine H Polasek1, Harry A Hoyen, Michael W Keith
1Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA. katharine.polasek@case.edu
Summary
Long-term implantation of nerve cuff electrodes in humans showed no adverse effects. These electrodes effectively enable chronic muscle activation and multichannel functional electrical stimulation, demonstrating consistent selectivity over three years.
Area of Science:
- Biomedical Engineering
- Neuroprosthetics
- Functional Electrical Stimulation
Background:
- Nerve cuff electrodes are a promising technology for interfacing with peripheral nerves.
- Understanding their long-term performance and safety in humans is crucial for clinical translation.
Purpose of the Study:
- To evaluate the long-term nerve and muscle response to stimulation via implanted nerve cuff electrodes.
- To assess the safety and efficacy of chronic muscle activation and selective recruitment using these electrodes.
Main Methods:
- Implantation of nine spiral nerve cuff electrodes in two human subjects for up to three years.
- Monitoring of nerve conduction velocity, stimulation thresholds, and muscle activation variability.
- Evaluation of selective muscle recruitment using multi-contact electrodes and field steering techniques.
Main Results:
- No adverse functional effects were observed throughout the three-year study period.
- Nerve conduction velocity remained within clinically accepted ranges.
- Stimulation thresholds stabilized around 20 weeks, with activation variability comparable to muscle-based electrodes.
- Selective muscle activation was achieved, with selectivity remaining consistent over time.
Conclusions:
- Nerve cuff electrodes are safe and effective for long-term use in humans.
- They enable reliable chronic muscle activation and multichannel functional electrical stimulation.
- The technology supports selective muscle recruitment, crucial for advanced neuroprosthetic applications.
