it can be diagnosed witih the appropriate scan. Usually vascular PD is either transiently responsive to drug therapy or not at all.
http://www.medical-library.org/journ...ns_disease.htm
PD drugs can give vivid dreams,, ask your movement disorder specialist about "Seroqul" to help with the vivid dreams.
Charlie, PD since 1990, DBS-STN in 2002 at UCLA