Healthy brains in the very old in the NACC path database Lead Investigator: Deniz Erten-Lyons Institution : OHSU E-Mail : ertenlyo@ohsu.edu Proposal ID : 108 Proposal Description: Abstract: Essentially I am interested in finding out how many of those who died over 90 years old in the NACC path database have healthy brains (as defined by minimal or no AD pathology and minimal or no vascular changes) and how this correlates with their premortem cognitive function.