that is good news indeed! My RN friend told me that it could take months to know the extent of his abilities, things can come back months later. Poor comparison, but when I had ankle surgery, I had no feeling in the top of my foot for over a year, then it came back.
I'd be painting Iodine on him, maybe in the collarbone area, to set up an area of counterirritation and take down the swelling in his neck. Details on what the swelling can do in "secondary injury" in this PDF: