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Related Concept Videos

Motor Unit Stimulation01:20

Motor Unit Stimulation

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When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
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Engineering Platform and Experimental Protocol for Design and Evaluation of a Neurally-controlled Powered Transfemoral Prosthesis
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FITFES: A Wearable Myoelectrically Controlled Functional Electrical Stimulator Designed Using a User-Centered

Marco Crepaldi, Rune Thorsen, Johanna Jonsdottir

    IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
    |October 14, 2021
    PubMed
    Summary

    This study developed FITFES, a wearable Myoelectrically Controlled Functional Electrical Stimulation (MeCFES) device for hemiplegic arm rehabilitation. User-centered design resulted in a comfortable, wireless device for effective movement therapy.

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    Area of Science:

    • Biomedical Engineering
    • Rehabilitation Technology
    • Neuroscience

    Background:

    • Hemiplegic arm impairment significantly impacts daily living and requires effective rehabilitation strategies.
    • Functional Electrical Stimulation (FES) is a key technology in restoring motor function.
    • Myoelectrically Controlled Functional Electrical Stimulation (MeCFES) offers advanced control for FES applications.

    Purpose of the Study:

    • To develop a wearable MeCFES device (FITFES) using a user-centered design approach.
    • To define essential features and functionalities for a device aiding hemiplegic arm rehabilitation.
    • To create a clinically and ergonomically viable prototype for task-oriented movement therapy.

    Main Methods:

    • A questionnaire-based survey of physiotherapists identified minimal viable features for the MeCFES device.
    • User-centered design principles guided the development of the wearable FITFES prototype.
    • The device was designed for wireless control via Bluetooth, incorporating specific stimulation parameters and low power consumption.

    Main Results:

    • A necklace-layout wearable MeCFES device (FITFES) was developed, minimizing hindrance during therapy.
    • FITFES supports wireless control and delivers biphasic, charge-balanced stimulation pulses (up to 113 mA, 300 V).
    • Low power consumption (320 mW typical, <[Formula: see text] sleep mode) enables full-day use on a single battery charge.

    Conclusions:

    • A multidisciplinary, user-centered approach is effective for designing clinically viable rehabilitation devices.
    • The FITFES prototype demonstrates the potential for ergonomic and effective wearable MeCFES in hemiplegic arm rehabilitation.
    • This user-centered design process yields a practical solution for improving patient outcomes in FES therapy.