As Jo*mar said, there may be a PT or chiro or osteopath who knows how to help you. Myofacial release, trigger point therapy, Specific Release Therapy (some chiros do this rather than spinal manipulations ) or osteopathic therapy may help with muscle spasms and imbalance. A PT or other who has broad skills with TOS (Thoracis Outlet Syndrome at C-6 to T-2 or T-3) may be helpful. Finding somebody willing to help with your spinal fusion may be a challenge.

Upper neck inflammation can cause a myriad of concussion like symptoms. Icing and other anti-inflammatory treatments can be worthwhile.

Omega 3 fish oil can help with inflammation. Read the Vitamins sticky at the top. Check the link to the updated post for more information. Helping the brain with good brain nutrition and anti-inflammatory supplements has helped many.