Few traumas to the human body are as suddenly and permanently devastating as spinal cord injuries. Unfortunately, it is most often young, highly productive, otherwise healthy adults who sustain such injuries, and thereafter suffer lifelong loss of movement, sensation, and bowel, bladder, and sexual function. In North America, over 10,000 people sustain a spinal cord injury each year, and currently there are estimated to be over 250,000 individuals living with chronic spinal cord paralysis (Sekhon and Fehlings, 2001). Important advances in medical, surgical, and rehabilitative treatments have improved the clinical care of spinal cord injured patients over the past few decades. Nevertheless, there are still no convincingly effective treatments currently available to improve the neurological status of these patients, and as such, their paralysis is currently an incurable condition.