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An EMG-to-force processing approach for determining ankle muscle forces during normal human gait

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3 Author(s)
R. A. Bogey ; Rehabilitation Inst. of Chicago, IL, USA ; J. Perry ; A. J. Gitter

Muscle forces move our limbs. These forces must be estimated with indirect techniques, as direct measurements are neither generally possible nor practical. An electromyography (EMG)-to-force processing technique was developed. Ankle joint moments and, by extension, ankle muscle forces were calculated. The ankle moment obtained by inverse dynamics was calculated for ten normal adults during free speed gait. There was close correlation between inverse dynamics ankle moments and moments determined by the EMG-to-force processing approach. Muscle forces were determined. The gait peak Achilles tendon force occurred in late single limb support. Peak force observed (2.9 kN) closely matched values obtained where force transducers were used to obtain in vivo muscle forces (2.6 kN). The EMG-to-force processing model presented here appears to be a practical means to determine in vivo muscle forces.

Published in:

IEEE Transactions on Neural Systems and Rehabilitation Engineering  (Volume:13 ,  Issue: 3 )