1. I had a series of injuries in 2002-3 (affecting head, neck and back) which stopped my dance life. I have since recouped as best as possible but lately I have had moments where my nerves in legs twang and I feel like I can't walk. I am going to the chiropractor this week, but I am wondering if there has been degeneration along the neck and spine. (Also a doctor stabbed me in the neck with a syringe of steroids...without permission in 2004, and I collapsed to the floor, and I wonder if this could be part of that. ) regardless, I am getting my alignment checked to see if there is a pinched nerve, but I would like to optimize my back for the rest of my life.  The only other injury was a dislocated patella and I rehabbed it but want to make sure my knees are going to last. My grandmother had hers replaced.