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Related Experiment Videos

Functionally selective peripheral nerve stimulation with a flat interface nerve electrode.

Dustin J Tyler1, Dominique M Durand

  • 1Neural Engineering Center, Applied Neural Control Lab, Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA.

IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
|March 4, 2003
PubMed
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A novel Flat Interface Nerve Electrode (FINE) reshapes peripheral nerves, enabling selective stimulation of nerve branches. This electrode design offers improved access to central axons for functional control.

Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Neural Engineering

Background:

  • Selective functional recruitment from peripheral nerves is crucial for advanced neuroprosthetics.
  • Accessing central axon populations within nerve trunks presents a significant challenge.
  • Existing electrode designs often struggle with precise targeting of specific nerve functions.

Purpose of the Study:

  • To introduce a novel Flat Interface Nerve Electrode (FINE) that utilizes neural plasticity for nerve reshaping.
  • To demonstrate the FINE's ability to increase surface area and bring central axons closer to the electrode interface.
  • To evaluate the FINE's efficacy in selective nerve branch recruitment.

Main Methods:

  • The FINE was acutely implanted on the sciatic nerve of eight cats.

Related Experiment Videos

  • Neural plasticity was leveraged to reshape the nerve into a flattened geometry.
  • Monopolar, square-pulse stimulation was applied using single and dual contacts.
  • Stimulation thresholds were measured using pulse amplitude and pulse-width modulation.

    • Main Results:

    • The FINE significantly reshaped the nerve and its fascicles (p < 0.0001) without altering the total cross-sectional area.
    • Single contacts on the FINE selectively recruited each of the four main sciatic nerve branches.
    • Stimulation thresholds were 2.89 nC (PAM) and 10.2 nC (PWM).
    • Combined stimulation of two contacts yielded additive effects on ankle joint moments.

    Conclusions:

    • The FINE effectively reshapes peripheral nerves, enhancing surface area and central axon proximity.
    • This electrode design facilitates selective recruitment of individual nerve branches.
    • The FINE shows promise for advanced neural interface applications requiring precise functional control.