NEW YORK (Reuters Health) - In a development that may offer hope to some people with spinal cord injuries, Arizona researchers report that a partly paralyzed man can now walk several hundred meters after having electrodes implanted in his lower back.. When used in combination with rehabilitation on a treadmill, the electric impulses delivered by the electrodes seem to have helped the spinal cord's circuitry relearn how to walk, according to Dr. Richard Herman of Arizona State University in Tempe.