Article Dans Une Revue Journal of Biomechanics Année : 2017

Comparison of methodologies to assess muscle co-contraction during gait

Résumé

The aim of this study was to compare co-contraction index (CCI) computed from muscle moments to different co-activation indexes (Co-Act) derived from EMG data at the ankle and the knee joint during gait. An EMG-driven model was used to estimate muscle moments during over-ground walking gait at a self-selected velocity from twelve healthy subjects. The CCI calculated from muscle moments was compared with three Co-Acts estimated from the normalized EMG data. The co-activation methods produced lower values than the CCI during the first double-support and the swing phase at the ankle joint and during the stance phase at the knee joint. The co-activation methods trend is to underestimate the simultaneous action of agonist and antagonist contraction. Because the EMG-driven model included the muscle mechanical properties (e.g. force-length-velocity relationship) and muscle moment-arm, the co-contraction based on major agonist and antagonist muscle moment may provide a more confident description of muscle action compared to co-activation indexes.

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Dates et versions

hal-01767617 , version 1 (16-04-2018)

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Citer

Hiba Souissi, Raphaël Zory, Jérôme Bredin, Pauline Gerus. Comparison of methodologies to assess muscle co-contraction during gait. Journal of Biomechanics, 2017, 57, pp.141-145. ⟨10.1016/j.jbiomech.2017.03.029⟩. ⟨hal-01767617⟩
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