Apparently, even just mid-cervical instability can cause these symptoms.
I had spinal cord compression in my C-spine due to instability at these levels. It was very, very obviously in the flexion and extension views. I am a few weeks out from ACDF. Realistically, I felt like we needed to stop the damage bc my symptoms were progressing by the month & I was deteriorating. It is too soon for me to comment much on recovery, but I do feel like my sleep has improved a bit.
My surgeon was not surprised by the many dxs I have been given nor the amount of specialists that failed to see this as a possibility. I left his office with the feeling that there may be more in this group that have Cervial Myelopathy. I do have hEDS.