The development of a prototype robotic system to facilitate upper extremity (UE) rehabilitation in individuals who sustain neurological impairments such as cervical level spinal cord injuries (SCI), acquired brain injuries (ABIs) or stroke (CVA) is described. A control system based on electromyography (EMG) signals has been implemented to provide the appropriate amount of assistance or resistance necessary to progress a patient’s movement recovery. Use of EMG signals has potential advantages over systems based only on torque and position sensors. The prototype system includes programmable mechanical impedance, adjustable thresholds and control gains. This robotic rehabilitation device would be used to provide repeated motor practice in an effort to promote neurological recovery and improve functional use of the UE.

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