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Segment Inertia Values & Joint Moments

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  • Segment Inertia Values & Joint Moments

    Hi Everyone

    I am a Ph.D student in mechanical engineering studying the effectiveness
    of orthotics in treating hypotonic or low muscle tone gait.The study will
    also attempt to reduce the volumes of data typically produced by gait
    analyses by identifying clinically relevant gait variables for this
    population. The subjects in this study are aged 12 months to 13 years.

    I am trying to decide between approximating the lower extremity joint
    moments using GRF data, or using a mathematical model to estimate the
    segment inertial parameters. Is there a general consensus that childrens'
    lower extremity segment inertial parameters are negligible for these
    analyses? Is there any literature which has examined the difference in
    joint moments produced by these two methods for a given sample?

    My experience with segment inertia data in the past has led me to believe
    that lower extremity inertias are negligible in children for the
    calculation of joint moments. Any advice/ opinions would be greatly


    Vicky Chester
    Institute of Biomedical Engineering
    University of New Brunswick, Canada

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