Variation in Cognitive Function of Mixed Neuropathology Lead Investigator: Erin Morgan Institution : University of Washington E-Mail : Erin.Renee.Morgan@gmail.com Proposal ID : 844 Proposal Description: Decline in cognitive function varies between neurodegenerative pathologies of AD, Lewy Body Dementia (LBD), Vascular Dementia (VD), and Frontotemporal Lobar Degeneration (FTLD). The rate of cognitive decline within each dementia subgroup has not been well established as a result, neither have any patterns of interplay between different pathologies. We seek to better define subtype specific rates of cognitive function and to evaluate the presence of interaction between pathologies.