Hi Clnolt. I was just reading through this site looking to see if anyone had Accessory Nerve damage like myself and came across your post. I had my AN severed during a surgical procedure years ago, been to hell and back x100 since. Many years spent in court as well.
My right shoulder/trapezius completely atrophied within 5 months of it happening, noone wanted to admit there was a terrible problem and each Dr kept fobbing me off once after another. I had Scapula winging as well withing the first 6 months. Chronic pain like I could never ever describe. Loss of function, loss of quailty of life.
Take care
Unfortunately for me I was told by a Right Shoulder Specialist here in Sydney that I was not a candidate for the Eden Lange Procedure as there was too much other damage but I would like to wish you luck in any treatment you mind be able to have. Do what you can and fight to feel better again, you don't want to be stuck with this years down the track. I am 37 now and my entire Adult life has been an uphill battle cause of the pain and suffering of this darn injury, do EVERYTHING you can. Take care