(Grabbing flak jacket, ducking and running for shelter.) Dear friends, I was apparently too subtle in my remarks about mental exercise. In my experience -- and I realize this a very biased sample -- PWP as a whole are more intelligent than average. This sample not only includes the members of this list, but also members of support groups in the Baltimore area. It was my wry observation that since PWP are smarter than your average bear they probably engage in more mental exercise than average. Just coping with Parkinson's disease is exercise enough in some instances. If mental exercise reverses or slows down the progression of Parkinson's disease then why is this phenomenon not appearing in any of us? Hence my statement that I doubted the experiment could be replicated using human subjects. I was not implying that certain groups of people are or are not more susceptible to Parkinson's disease. By the way, Heather will be going into surgery this Wednesday. Your prayers for her are greatly appreciated. Bruce 56/9 Sinemet CR & Mirapex