I had spinal fusion a yr ago on c5-c7. I was hit at work by a heavy glass door when one side gave way slamming my right shoulder, pushing me into a crowd of people. Afterwards the symptoms of nerve pinching, pain, headaches, pins ans needles , numbing, aching and pain down arm returned. Just had an MRI this week. Fusion is fine C4- c5 has a paralateral/far left disk protruision causing mild stenosis, mass effect on nerve root entry zone.