Shirley wrote: "It's times like these when I wish there were pictures or drawings to see so I can better understand all this." Well Shirley have I got a book for you. "Essentials of Neural Science and Behavior" by Kandel, Schwartz, Jessell You can buy it at http://www.ecampus.com/homepage_html.html. They had the best price. The book is used for an undergraduate biomedical engineering course at USC so it is a lot heavier than the typical patients guide to PD. Phil Gesotti 50/46+