@michc56 You may be interested in this web page about nerve regeneration. Peripheral nerves can regenerate and grow 1 to 2 mm per day under optimal conditions.
https://asutahealth.org/how-damaged-nerves-can-heal-understanding-the-nerve-regeneration-process/
I also checked with my husband who had lost feeling in his pinky finger after removal of a skin cancer on his hand 6 years ago. He has regained feeling in the finger, but with a slight feeling of electric shock when touching it. That is improvement, but not back to perfect pre-surgical function. Other factors that affect pain are scar tissue and inflammation and surgery does create those. For scar tissue, there is a special physical therapy called myofascial release.

Here is our discussion where you can learn about myofascial release.
https://connect.mayoclinic.org/discussion/myofascial-release-therapy-mfr-for-treating-compression-and-pain/
I have done a lot of MFR work with a physical therapists before and after my spine surgery and it helped me a lot. I use techniques I have learned to so self-stretches and to release the re-occurring tightness of my surgical incision.

Right now, you are 4 months past your surgery if I read that right. That isn't a lot of time and doctors usually say it takes a year for complete healing. You may be having muscle spasms that are rotating your movable vertebrae if you are experiencing vertigo. I had that when my C1 and C2 were rotating on their own. It might be worth asking that question. A physical therapist should be able to help with that.

I know it can be frustrating, but healing takes patience and the belief that things will get better. If you believe you can do it, you have more energy directed toward your recovery.

Your thoughts about this?