Implanted Myoelectric Control for Restoration of Hand Function in Spinal Cord Injury

Inclusion Criteria: * C5-C8 spinal cord injury * Minimum of one-year post injury with no additional function prior to implantation surgery * Male or female * 18-60 years of age * intact vision * pharmacologically controlled spasticity, when applicable * Functional in wheelchair with adequate trunk support to allow bimanual manipulation * Positive attitude and motivation with supportive home environment * Willingness to return to laboratory for periodic evaluation and testing * Free of contractures known to diminish performance of the system (e.g., supination contracture of the wrist). * Integrity of the lower motor neuron (peripheral nerve) to the muscles to be activated * Adequate range of motion of joints of the shoulder, wrist, and hand (upper extremity). * If an acute infection is present, the subject will not be considered for surgery until it clears. Exclusion Criteria: * Prior history of a major chronic systemic infection or other illness that would increase the risk of surgery. * Contraindications include immunologic diseases, cardiac arrhythmias, undiagnosed or high-risk breast masses, dermatologic conditions, and any major system failure. * Acute infection currently present that has not cleared. * Hypersensitivity that inhibits their ability to sustain pressure over their digits. * Blind * Uncontrolled disorders, i.e., seizures