Proposal of the movement trajectories for a superior extremity, to build the movement regulator of a trans-humeral prosthesis

tT his work obtains the patterns of movement trajectories during daily tasks of a right superior extremity, these patterns will be used to reproduce the movement in a Trans-Humeral prosthesis. In this way the movements of the prosthesis will come near to the natural movements of the superior extremity. The trajectories are obtained using three fluorescent spherical markers placed in the shoulder, elbow and wrist of the superior extremity, two digital camcorders capture the sequence of movements when a right superior extremity executes daily tasks, The trajectories of the forearm are described with angles, with respect to an axis XYZ, whose origin is set to the elbow and, the axis Y, is superposed in the arm. The capture frequency was of 30 frames per second.