The design of a prosthetic device for patients who have suffered loss of muscular control of the hand is described. The authors present some preliminary design considerations, with emphasis on the sensing and actuation systems. The prototype achieves several movements of the fingers of the hand. The design is closely based on the natural human hand to ensure effectiveness and comfort. The exoskeleton is worn as a tight glove, and the joints are flexed by cables and motors. Some preliminary test results are reported.

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