Regarding recent mail on Dementia, the Parkinsons web site at: <http://neuro-chief-e.mgh.harvard.edu/parkinsonsweb> gives the following quote on the subject. Dementia (senility) consists of difficulty with memory. recognition! abstraction. and calculation. It may also be associated with confusion and disorientation. Senility, when present. occurs among elderly patients in the later stages of PD. However. it is erroneous to assume that senility is an inevitable outcome. Furthermore. in cases of PD with senility, the senility ranges from mild to a more marked decline. Many physicians believe that the more common form of Parkinson's Disease (without senility) differs from those cases with senility. PD without senility usually begins in patients in their 40s, 50s, and 60s! runs a long course; and responds well to medications. PD with senility begins in older people and usually runs a shorter and more severe course. The senility of PD may resemble Alzheimer's Disease. Wishes to all, Ernie Peters ([log in to unmask])