title: Preserving brain function. Living with purpose may protect against changes.
mesh_terms: D000368:Aged; D003071:Cognition; D003704:Dementia / Q000517:prevention & control*; D005260:Female; D015438:Health Behavior; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D008603:Mental Health; D008875:Middle Aged; D012649:Self Concept; D012944:Social Support