 Quality of Life, cognitive, autonomic function and sexual function questionnaires. Subjects will be asked to complete a variety of questionnaires focusing on quality of life, disability, cognitive, autonomic and sexual function. Spinal cord injury CDE standard questionnaires will be used in addition to standard quality of life questionnaires. These questionnaires will be administered prior to implantation, at the end of each training paradigm and at each follow up. 