The tingling feeling he gets from the radiation is L'Hermitte's Syndrome, and I had it for quite awhile, but it disappeared on its own. More disconcerting than anything, and I almost didn't notice when it went away.
I also have considerable stiffness in the neck and shoulders, and I just recently was prescribed an exercise regiment to help. I need to get better about actually doing them, but they seem to be helping a bit.
Hope all goes well. Just one step at a time!