Patent ID: 8679192

Claim:
A myoelectric data acquisition system for controlling an arm prosthesis comprising: a first and a second electrodes adapted to be placed in a muscle in a residual piece of a person's amputated arm, the first and the second electrodes detect myoelectric signals, a third electrode adapted to be placed away from said residual piece of the person's amputated arm, said third electrode is placed a distance away from said first and second of electrodes, the third electrode functions a ground, a conditioning device to condition the myoelectric signals, and a control and processing device to receive the conditioned signals from the conditioning device, wherein the control and processing device includes: a comparing device for evaluating a muscular contraction time by using a threshold time and a muscular contraction voltage by using a threshold voltage an activating device for activating at least one motor, said motor producing a predetermined movement of the arm prosthesis in response to an activation signal which is sent from the comparing device, wherein the system uses the muscular contraction time in order to control different arm prosthesis movements; wherein the different arm prosthesis movements are made performed without changing the first and the second electrodes to another muscle; wherein the movement of the arm prosthesis includes opening of a hand of the prosthesis, a closing of the hand of the prosthesis, pronation of a forearm of the prosthesis, supination of the forearm prosthesis, flexion of the arm prosthesis, and extension of the arm prosthesis.