Unfortunately, existing therapies for recovering arm and hand function after stroke have limited success and often work only for patients who retain some ability to move. Recent therapeutic developments have utilized the phenomenon of neuroplasticity, the capability of the central nervous system to relearn how to perform different tasks that might have been severely impaired or impossible following a spinal cord injury or stroke. It is believed that the active attempt to move combined with the actual movement of the arm and/or hand produced by functional electrical stimulation and the sensory feedback produced by the movement engages portions of the nervous system relevant to the specific task, promoting neural changes that in turn result in recovering voluntary movement.