Jean,
My wife, Ursula, agrees with you. She says it's not 20%, it's 99%, who are affected in intense ways, by the drugs, and by the disease itself. It is not just a movement disorder, not just trembling, not just physical. She wants me to stop the emotional bungee jumping for awhile. With her, I just do what I am told.
http://parkinsonsdance.blogspot.com/...hapter-99.html