For the reasons above, the Investigators feel our study is different from those of the past. The Investigators believe that due to the severity of the problem and lack of effective therapeutic options combined with the less than stringent studies to date that our study should be done. The Investigators realize that prior attempts at pain control with DBS have been lackluster. However, our study is not only based on prior clinical attempts but also on basic science research from the Miami Project to Cure Paralysis. These studies performed by Dr. Ian Hentall (co-investigator) suggest strongly that stimulation of the periaqueductal grey on a chronic basis is effective for pain control. Likewise, they suggest a beneficial effect on autonomic dysreflexia, a potentially life threatening complication of SCI, as well. As a result, our study will also focus on evaluating the effects of DBS on autonomic dysreflexia with very stringent outcome measures, another unique aspect of this study. There is also data in humans to suggest that the PAG is a central control center for autonomic function.