The sensory signals computed by the microprocessor are used to control the resistance generated by hydraulic cylinders in the knee-joint.
A myoelectric prosthesis uses electromyography signals or potentials from voluntarily contracted muscles within a person's residual limb on the surface of the skin to control the movements of the prosthesis, such as elbow flexion/extension, wrist supination/pronation (rotation) or opening/closing of the fingers.