Importance

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Abstract

A computerized electronic hand prosthesis apparatus and method utilizing input, feedback, control, and operating systems configurable to provide precise control and gripping forces corresponding to the particular capabilities and requirements of an individual wearer. An articulated prosthesis is capable of exerting a mechanical gripping force and contains a programmable microcomputer. Electrodes on the prosthesis contact muscles of the remnant portion of a limb and produce an electric command signal responsive to the myoelectric signal created by the wearer contracting and relaxing the muscles in the remnant portion. A drive motor in the prosthesis causes the prosthesis to exert a mechanical gripping force responsive and proportional to the electric command signal. Force sensors in the digits of the prosthesis detect the force exerted and produce an electric sensor signal responsive and proportional thereto. A motor driven vibratory device on the prosthesis engages the remnant portion of the limb adjacent sensory nerves and produces a feedback signal perceptible to the wearer which changes in vibratory pattern and amplitude at various selective grip forces. A communication port on the prosthesis is releasably connected to peripheral devices for exchanging data, diagnosing, correcting, or setting the operational parameters of the prosthesis. The electrodes, drive motor, force sensors, vibratory device, and communication port are controlled by the microcomputer.

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First Claim