This paper describes the development of a system feedback or biofeedback physiological activity aimed at the rehabilitation of patients with severe upper extremity motor disorders caused by the central nervous system. In the proposed system use of surface electromyographic signals acquire the information of muscle activity patient and then a stage of processing is done a visual and auditory feedback through a graphical interface. This information may provide feedback to patient recognition of residual activity allows us to train their muscles proprioception and skill altered in the event of brain injury.