WHEW, been spending time to read this thread, your poor mother has been through the gamet. Whenever I read "atypical Parkinsonism", it immediately brings to my mind Lymes Disease. LD mimics a lot of PD symptoms. If your mother has had any exposure to ticks, even without any known bites, you might consider getting her tested for LD using the more expensive but more accurate test called Western Blot by Igenex (NOT the test by Labcorp). Just a thought, Good Luck

TG