Note that the question asks for three cortical dementias (not noncritical dementias). The essay will choose three common dementias – PERHAPS DAT, VD and FTD – and describe the symptoms of each, noting the COMMONALITIES between them and also the differences. The essay will explain why the symptoms are different, with reference to the dementias' underlying neuropathology, and why they are similar. A very good essay will outline the problems with making a certain diagnosis of SPECIFIC dementia.

Note that the question asks for three cortical dementias (not noncritical dementias). The essay will choose three common dementias – perhaps DAT, VD and FTD – and describe the symptoms of each, noting the commonalities between them and also the differences. The essay will explain why the symptoms are different, with reference to the dementias' underlying neuropathology, and why they are similar. A very good essay will outline the problems with making a certain diagnosis of specific dementia.