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Related Experiment Video

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Wheelchair Neuroprosthesis for Improving Dynamic Trunk Stability.

Kramay Patel, Matija Milosevic, Kimitaka Nakazawa

    IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
    |July 18, 2017
    PubMed
    Summary
    This summary is machine-generated.

    A new wheelchair-based neuroprosthesis using functional electrical stimulation (FES) effectively improved trunk stability in able-bodied individuals. Directionally-dependent FES contractions were more effective than co-contractions for enhancing stability.

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    Area of Science:

    • Biomedical Engineering
    • Neuroprosthetics
    • Rehabilitation Technology

    Background:

    • Trunk instability is a significant challenge for individuals with thoracic and cervical spinal cord injuries.
    • Functional electrical stimulation (FES) neuroprosthesis has shown promise in improving trunk stability during sitting.
    • Existing FES applications for trunk stability have limitations in dynamic wheelchair use.

    Purpose of the Study:

    • To develop and test the feasibility of the first powered wheelchair-based neuroprosthesis.
    • To evaluate the effectiveness of FES protocols in enhancing trunk stability during wheelchair motion.
    • To compare the efficacy of different FES strategies for trunk stabilization.

    Main Methods:

    • A novel powered wheelchair-based neuroprosthesis was developed.
    • Eleven able-bodied male participants were recruited for a feasibility study.
    • Two FES protocols (co-contraction and directionally-dependent contraction) were tested against sham stimulation during controlled wheelchair movements (forward/backward, slow/fast accelerations).
    • Inertial motion sensors quantified trunk angular displacement and velocity.

    Main Results:

    • Both FES protocols significantly reduced trunk displacement and velocity compared to control conditions.
    • Directionally-dependent FES contractions demonstrated superior effectiveness in improving trunk stability over co-contractions.
    • The wheelchair-based neuroprosthesis system proved feasible for enhancing trunk stability.

    Conclusions:

    • The developed wheelchair-based neuroprosthesis is feasible for improving trunk stability.
    • Directionally-dependent FES is a promising strategy for dynamic trunk stabilization in wheelchair users.
    • Future research should integrate wheelchair movement feedback and test the system with spinal cord injury patients.