Answer:
Accessory nerve is the eleventh cranial nerve. It originates from the lateral of the olives ( a structure in the medulla of the brain). It supply the motor function only. The muscles supplied by Accessory nerve is trapezius muscle and the sternocledomastoid muscle.
I had my accessory nerve cut by accident in a lymph node removal procedure. I was not able to move my arm for 2 weeks. I started doing physical therapy because at the time I didn't know my nerve was cut, we thought it was just maybe slightly damaged. Therapy helped with easing pain. I can't shrub my shoulder up & down or shrub it forward & back, or squeeze my scapula together. I also can't raise my arm past my chest. I can't make a wingspan what so ever. I also lost the feeing in the side of my face, neck, parts of my chest around the clavicle area, shoulder, & scapula. The pain is terrible, it will stop you in your tracks. I sometimes scream when I receive nerve shocks. I have a lot a pain in my head too. My vision in one eye became blurry at times & the hearing in my ear was very pore, it sounded like I a "wooshing" sound kinda like a seashell to my ear. I can't stand for more than 5 minutes before the pain gets unbearable. Reclined or laying down relieves slot of pain. & I can go on forever about symptoms.
I actually just had surgery last week in attempt to fix my arm but I wont actually know if the surgery worked for 6 months when I have an EMG test done, but until then I'm in an arm immobilizer, they have my arm strapped down to my side 24/7 & I can never take it off, not even in the shower, & I can only sleep on one side for 3 weeks & this thing hurts, I'm like bruised around my ribs from it. I can't even get in a car. The reason why I have to wear that thing is because the stitched that they used to reattach all the severed nerves are smaller than a strand of hair & any jerking motion can tear open the stitches.
If anybody knows of anyone who has this injury, comfort them. It's a very devastating, depressing, & a very painful injury. It's not a injury where you have surgery one day & are back at work 2 weeks later, it's a 2-4 year recovery span. So lots of physical therapy and prayers that we all have the best outcome. It puts your life on hold. And my best advice to people enduring this same injury is to stay positive as hard as you can. Do not let this injury get the best of you. There will bee a light at the end of every tunnel :)