DementiaAlzheimer DiseaseDementia, VascularAmyloid beta-PeptidesCognition DisordersDementia, Multi-InfarctNeuropsychological TestsLewy Body Diseasetau ProteinsNeurofibrillary TanglesBrainPlaque, AmyloidAmyloid beta-Protein PrecursorAIDS Dementia ComplexApolipoprotein E4AtrophyMild Cognitive ImpairmentCaregiversNeurofibrilsCognitionMemory DisordersMagnetic Resonance ImagingAgingAmyloidLewy BodiesPresenilin-1Longitudinal StudiesAmyloid Precursor Protein SecretasesApolipoproteins ECholinesterase InhibitorsParkinson DiseaseNursing HomesAge of OnsetPsychomotor AgitationFrontotemporal Lobar DegenerationAutopsyDisease ProgressionMemantineHippocampusPick Disease of the BrainGeriatric AssessmentCerebral CortexTemporal LobePeptide FragmentsRisk FactorsNeurodegenerative DiseasesNootropic AgentsPsychiatric Status Rating ScalesCohort StudiesSeverity of Illness IndexCerebral Amyloid AngiopathyNeuronsTauopathiesPhenylcarbamatesBehavioral SymptomsPresenilin-2National Institute on Aging (U.S.)Homes for the AgedFrontal LobeAphasia, Primary ProgressiveNerve DegenerationIndansAniline CompoundsMemoryMice, TransgenicInstitutionalizationActivities of Daily LivingAge FactorsPositron-Emission TomographyBrain ChemistryCase-Control StudiesAmnesiaAspartic Acid EndopeptidasesFollow-Up StudiesBiological MarkersSubstantia InnominataMental Status SchedulePresenilinsDisease Models, AnimalAmyloidogenic ProteinsMental CompetencyDown SyndromeWandering BehaviorBrief Psychiatric Rating ScaleGalantamineProspective Studiesalpha-SynucleinReproducibility of ResultsCerebrovascular DisordersGenotypeGenetic Predisposition to DiseaseSupranuclear Palsy, ProgressivePredictive Value of TestsHydrocephalus, Normal PressureProdromal SymptomsIncidencePrevalenceTacrineDNA Repeat ExpansionDepression