Goes to show you how much I know. LOL What a horrible thing to have happen!!! I've never heard of this, and it's unfortunate they don't do more research on why this happens, and how to treat it.
It's got to be terrifying to wake up, or sometime later having your arm paralyzed! And then to be told to wait up to a YEAR for it to resolve? That's just not acceptable to me, anyway!!~
I wish you the very best! I hope you will keep us informed as to what happens, and especially when it resolves itself! God bless and PLEASE take care. Hugs, Lee!