Hi CST,
How often we hear it's all in your head! The brain can detect pain or feeling where it "should not". I have achieved some benefit from yoga. Being T12 complete, I do have upper body freedom. Spinal exercise and deep breathing have gone hand in hand to help both the neurological pain, and have helped me feel more upbeat. It is only fair to recognise the fact that there are not that many teachers of yoga around, and those that visit are even fewer on the ground. Since doing manual leg flexions (long sitting in bed) I have a greater feeling of integration with my legs even though they do not have true touch sensation.
Meditation takes many different forms and comes from different traditions, but I have found it (eastern) helpful in maintaining more equanimity about my being. Generally since returning to the yoga that I can still perform, I have felt better all round. I am coming to believe that bowel and bladder care have improved as well. A web reference that may help is:
http://matthewsanford.com/ Very best wishes
Chris.