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    Correlation between EMG-based co-activation measures and medial and lateral compartment loads of the knee during gait

    Access Status
    Fulltext not available
    Authors
    Winby, C.
    Gerus, P.
    Kirk, Brett
    Lloyd, D.
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Winby, C. and Gerus, P. and Kirk, T. and Lloyd, D. 2013. Correlation between EMG-based co-activation measures and medial and lateral compartment loads of the knee during gait. Clinical Biomechanics. 28 (9-10): pp. 1014-1019.
    Source Title
    Clinical Biomechanics
    DOI
    10.1016/j.clinbiomech.2013.09.006
    ISSN
    02680033
    URI
    http://hdl.handle.net/20.500.11937/39448
    Collection
    • Curtin Research Publications
    Abstract

    Background: Inappropriate tibiofemoral joint contact loading during gait is thought to contribute to the development of osteoarthritis. Increased co-activation of agonist/antagonist pair of muscles during gait has commonly been observed in pathological populations and it is thought that this results in increased articular loading and subsequent risk of disease development. However, these hypotheses assume that there is a close relationship between muscle electromyography and force production, which is not necessarily the case. Methods: This study investigated the relationship between different electromyography-based co-activation measures and articular loading during gait using an electromyography-driven model to estimate joint contact loads. Findings: The results indicated that significant correlations do exist between selected electromyography-based activity measures and articular loading, but these are inconsistent and relatively low. However despite this, it was found that it may still be possible to use carefully selected measures of muscle activation in conjunction with external adduction moment measures to account for up to 50% of the variance in medial and lateral compartment loads. Interpretation: The inconsistency in correlations between many electromyography-based co-activation measures and articular loading still highlights the danger of inferring joint contact loads during gait using these measures. These results suggest that some form of electromyography-driven modelling is required to estimate joint contact loads in the tibiofemoral joint.

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