Here's a link to a write-up. http://blog.aarp.org/2013/08/23/linda-ronstadt-discloses-her-battle-with-parkinsons-disease/?sf16438510=1

My local YMCA has a yoga class for people with balance disorders. I don't know why balance is such a problem for me, but some of the other people in the class have Parkinson's. I marvel at their courage.