have constructed more neural pathways....that's the name of the game. I just heard a local health guru on a tv interview say if you want to save your cells or at least maintain, you should be learning and challanging yourself all the time. His suggestion was learn a new operating system for your computer. If your getting frustrated, thats the counterpart of sweating if you work out physically. Along these same lines I have noticed that the people I know with PD who live alone have many more day to day problems to solve....(like how the heck am I gonna get to my medication on the other side of the room???) because they do not have a care giver to fetch, cook, and just generally take care of all their needs. They do a lot more problem solving than those who don't live alone and they seem to be a little bit quicker on the draw when it comes to wit and wisdom. Maybe I'm just imagining things, but any kind of problem solving is good brain exercise. So go climb that mountain baby!!!!