Hi Nan. Welcome to Mayo Connect. Hopefully Elizabeth will see your post and respond to you, but her last post was in July so she might not be following Connect that closely now. I actually started a discussion a while ago about ACDF surgery. A friend of mine was having one done and I was trying to elicit experiences from others who had had it done. Here is a link if it's of any interest to you: https://connect.mayoclinic.org/discussion/anyone-had-an-anterior-cervical-corpectomy-and-discectomy-with-fusion/?pg=1#comment-367661
I am sorry that your doctor will not discuss what was done to you during surgery, i.e. the reason your shoulders evidence these areas of "brachial plexus injury" as you say. Liability issues really drive a wedge between doctors and their patients unfortunately.
Nerve pain is the WORST! My wife has peripheral neuropathy in her feet and ankles and there is (so far) no cure. But I try to monitor the neuropathy group myself. Occasionally a good idea will appear and we will try it. Some actually have been helpful to my wife.
I'm so sorry for what has happened to you. My heart goes out to you for sure! I hope you are able to get some benefit and enjoyment from using Connect. All my best to you, Hank