PROTOCOL OUTLINE: Patients undergo surgery in which electrodes are sutured into areas of the pelvis and legs. Electrode leads are inserted into a receiver/stimulator implanted in a subcutaneous pocket in the abdomen. Following implantation, patients undergo training in standing, transfers, and other advanced mobility skills using the functional neuromuscular stimulation system. Restricted activity continues for 2 weeks after surgery, followed by 8 weeks of exercise. Standing training then begins, and continues for up to 6 weeks. Home-based training follows prior to discharge with the system for spontaneous use.