Résumé :
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The gait analysis provided different kinematic patterns of walking in the Charcot Marie Tooth disease (CMT). The dynamic electromyography (EMG) described the muscles pattern for each type of gait in CMT. The classical gait pattern in CMT is characterized by a drop foot during the swing phase: the dorsal flexor muscles of ankle were weak in relation to the plantar flexor muscles. But the drop foot was often absent and in this case it was the plantar flexor muscles of ankle which were weak in relation to the dorsal flexor muscles. Also the gait analysis described a delayed and/or increased peak of dorsal flexor ankle, during the stance phase: the heel lift (“third rocker”) is delayed. These data are studied in a sample of 10 subjects. Thus the dynamic EMG revealed the balance between agonist and antagonist ankle muscles and the reliability of the gait pattern and the foot deformity. It performs the importance of this functional exam. These neurophysiological and dynamic data facilitate the therapeutic strategy (orthosis, physical therapy, surgery) and the functionnal evaluation.
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