Methods :
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EMG Visual estimation (surface and needle) amplitude or percentage of
the overlap of the agonist-antagonist muscles considered :
The muscle study coordination during locomotion is based on a biomechanical phenomena characterization
In the literature we can separate two types of gait analysis: those seeking to describe the biomechanical mechanisms of walking by an overall analysis of the body (Benedetti et al., 1998) and those focusing on the kinematic behavior of a specific articulation or segment (Lafortune et al., 1992, MacWilliams et al., 2003).
The gait biomechanical characterization uses kinematic and dynamic parameters. Only the kinematic method used in this work will be described.
Kinematics is not concerned with the forces that determine motion, but with motion as such, using variables (kinematics) to describe it: displacement (trajectory), velocity and joint angular curve . (Winter, 1991).