Noninvasive Spinal Stimulation in Stroke

OBJECTIVES: * To determine whether transcutaneous spinal cord stimulation combined with ambulation training modulates corticospinal locomotor networks in individuals with chronic hemiplegic stroke * To determine whether transcutaneous spinal stimulation combined with ambulation training improves locomotor function in individuals with chronic hemiplegic stroke * To determine whether transcutaneous spinal stimulation combined with ambulation training improves symmetry of gait in individuals with chronic hemiplegic stroke * To determine whether transcutaneous spinal stimulation combined with ambulation training improves standing posture and balance in individuals with chronic hemiplegic stroke * To determine whether ambulation efficiency (improved cardiovascular conditioning) improves with transcutaneous non-invasive spinal stimulation and locomotor training in individuals with chronic hemiplegic stroke