I had surgery about six months ago, fusion 5-6. After months of muscle spasms afterwards they decided to put Botox in the muscles in shoulder and upper back to releave it as PT said he couldn't stop them. Eight days after Botox, my left arm dropped and now I can't raise my arm but half way, left hand is numb. I had Botox the first of November, they say the use of my arm should come back but it is really not getting any better and the muscle connecting neck and shoulder is tight and painful. Anyone ever heard of this??? I was better four weeks after surgery-- now I can't lift my left arm. Doc did a MRI and says everything looks great.