Estimation of the kinetic-optimized stimulus intensity envelope for drop foot gait rehabilitation

S. Tanabe, S. Kubota, N. Itoh, T. Kimura, Yoshihiro Muraoka, A. Shimizu, Y. Kanada

    Research output: Contribution to journalArticle

    Abstract

    The purpose of present study is to estimate the optimal stimulus intensity envelope for drop foot rehabilitation based on a kinetic perspective. The voluntary and electric-stimulated elicited dorsiflexion torque responses of 11 healthy subjects were measured. During dorsiflexion, we recorded the tibialis anterior (TA) electromyography (EMG) or the stimulation intensity at four angles of the ankle joint. From these measurements, we derived two approximate equations that estimate dorsiflexion produced by either voluntary contraction or by electrical stimulation using a sigmoid function and a stepwise-regression analysis. We then tested the predictive capability of the model using Pearson correlation. Both equations indicated high correlation coefficients. Finally, we derived a relation between the TA EMG amplitude and stimulation intensity. From the obtained equation, we determined the optimal stimulus amplitude. We assume that the derived stimulus intensity envelope, calculated from EMG amplitude and angle of ankle joint, satisfies kinetic demand.

    Original languageEnglish
    Pages (from-to)210-216
    Number of pages7
    JournalJournal of Medical Engineering and Technology
    Volume36
    Issue number4
    DOIs
    Publication statusPublished - 2012 May

    Fingerprint

    Neurologic Gait Disorders
    Electromyography
    Patient rehabilitation
    Ankle Joint
    Rehabilitation
    Kinetics
    Torque
    Sigmoid Colon
    Regression analysis
    Electric Stimulation
    Foot
    Healthy Volunteers
    Regression Analysis

    Keywords

    • Ankle dorsiflexion torque
    • Drop foot
    • Functional electrical stimulation
    • Tibialis anterior

    ASJC Scopus subject areas

    • Biomedical Engineering
    • Medicine(all)

    Cite this

    Estimation of the kinetic-optimized stimulus intensity envelope for drop foot gait rehabilitation. / Tanabe, S.; Kubota, S.; Itoh, N.; Kimura, T.; Muraoka, Yoshihiro; Shimizu, A.; Kanada, Y.

    In: Journal of Medical Engineering and Technology, Vol. 36, No. 4, 05.2012, p. 210-216.

    Research output: Contribution to journalArticle

    Tanabe, S. ; Kubota, S. ; Itoh, N. ; Kimura, T. ; Muraoka, Yoshihiro ; Shimizu, A. ; Kanada, Y. / Estimation of the kinetic-optimized stimulus intensity envelope for drop foot gait rehabilitation. In: Journal of Medical Engineering and Technology. 2012 ; Vol. 36, No. 4. pp. 210-216.
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    AU - Shimizu, A.

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