 The proposed studies will allow us to gather critical information using commercially available electrodes to design the more advanced multi-electrode array technique that will be adaptive and conceivably be effective in a wider range of patient populations. The current electrodes used in this study will serve two objectives: 1 to improve standing and stepping with the combination of epidural stimulation and locomotor training in individuals with functionally complete SCI; and 2 to provide critical information for the development of more advanced electrodes. 