> One of the things I often wonder about is what are the different types of > on and off periods experienced by PD people? you may be refering to the on/offs that occur after some years of dopatherapy. Those are fluctuations of the absorbtion of the ldopa. There are end of dose ´offs´ and some people get beginning of dose ´offs´'too. John calls these periods ´falling into a hole´. His meds kick in and after a certain time, for him an average of 1h30-2hours, he falls into an´off´ period, very suddenly. These on/off fluctuations started after 7 years of treatement. Maryse cg JOhn 77,17 ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn