I injured my upper back around one year ago. I've seen three Chiropractors, two M.D.s, and a Dr. of Osteopathy. I have gotten the best results from the D.O. but I apparently re-injured my back, possibly worse than before. My symtoms over the last week have been a serious loss of balance and strength in my legs and other extremities. It's like my body is very drunk but my mind is clear. I fell down this morning due to my right leg giving out like when someone hits you in the back of your knee. I'm 62 years old and otherwis healthy(?) and I'm hoping someone can give me a possible diagnosis and/or advice on this condition. Thanks.