I do a LOT of work for a Parkinson's disease center. It's a shitty, shitty disease, and when you get hit with Parkinson's as young and hard as he has been, the prognosis is truly lousy.
My job is depressing ... neurological diseases rarely have a good outcome; people don't get better from shit like multiple sclerosis, Parkinson's , Altzheimer's, multiple systems atrophy, autonomic dysfunction, or -- my personal favorite <sarc> -- ALS (god I fucking hate hearing that diagnosis).
Oh well, off to work