DementiaAlzheimer DiseaseDementia, VascularAmyloid beta-PeptidesCognition DisordersBrainDementia, Multi-InfarctNeuropsychological TestsLewy Body Diseasetau ProteinsNeurofibrillary TanglesPlaque, AmyloidAmyloid beta-Protein PrecursorAIDS Dementia ComplexApolipoprotein E4Fragile X Mental Retardation ProteinAtrophyFragile X SyndromeMild Cognitive ImpairmentAchondroplasiaCaregiversNeurofibrilsCognitionMagnetic Resonance ImagingAge of OnsetAgingMutationDisease ProgressionDisease Models, AnimalMemory DisordersGenetic Predisposition to DiseaseAmyloidRisk FactorsLewy BodiesPresenilin-1Longitudinal StudiesAmyloid Precursor Protein SecretasesApolipoproteins ECholinesterase InhibitorsCohort StudiesHippocampusGenotypeCase-Control StudiesParkinson DiseasePedigreePeptide FragmentsNeuronsNursing HomesSeverity of Illness IndexPsychomotor AgitationFrontotemporal Lobar DegenerationMice, TransgenicGlomerulonephritis, IGAAutopsyAge FactorsPhenotypeMemantinePick Disease of the BrainGeriatric AssessmentCerebral CortexTemporal LobeAllelesMolecular Sequence DataFollow-Up StudiesAmyloidosisNeurodegenerative DiseasesNootropic AgentsPsychiatric Status Rating ScalesPolymorphism, Single NucleotideNerve Tissue ProteinsBiological MarkersPrevalenceDNA Mutational AnalysisTime FactorsMyotonic DystrophyCerebral Amyloid AngiopathyTauopathiesPhenylcarbamatesReproducibility of ResultsBehavioral SymptomsPresenilin-2National Institute on Aging (U.S.)Homes for the AgedChromosome MappingFrontal LobeAphasia, Primary ProgressiveLod ScoreIncidenceMutation, MissenseFamilyNerve DegenerationIndansGene FrequencyAniline CompoundsProspective StudiesRetrospective StudiesMemoryImmunohistochemistryInstitutionalizationActivities of Daily Living