<<I.e., does taking an arm movement as either a) a simple physical task to do or b) as a kind of ballet gesture entail differing cognitive involvements and neurological engagements? >> Tom, I just skimmed your post and it is very much in tune with my experience as a PWP and student of tai chi. The benefits of tai chi specifically for Parkinson's have been documented. I am convinced that our wonderful, flexible brains are able, through certain types of mind-body training, to set up alternate neural pathways and connections, and it sounds like this is where you are going with your work. You write of the imagination. I find that if I am tense, which is bad for us all but worse if you have PD, I can relax by imagining myself doing tai chi moves. Regards, Kathleen ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn