<prompt> All of the following cause subcoical dementia, Except:Alzheimers diseasePorkinsonismHIV encephalopathyProgressive Supranuclear palsy  <response>: Answer is A Alzheimers disease: Dementia from Alzheimers disease Dementia of Alzheimers Type is the classical proto-type of coical dementias. Alzheimers dementia is the most common coical dementia. 