 In the trial, researchers will study 18 adults 18-70 years old with spinal injuries T5 level or higher, at least 12 months following the date of injury. After an evaluation of medical history, a brief physical examination, and initial testing, participants will have small electrodes metal discs placed by a routine surgical procedure over the surface of their spinal cords on the lower back to stimulate the expiratory muscles and restore cough. 