DementiaDementia, VascularCognition DisordersAlzheimer DiseaseNeuropsychological TestsDementia, Multi-InfarctMild Cognitive ImpairmentLewy Body DiseaseAIDS Dementia ComplexMemory DisordersBrainCognitionCaregiversAtrophyNursing HomesMagnetic Resonance ImagingAgingGeriatric AssessmentParkinson DiseaseLongitudinal StudiesSeverity of Illness Indextau ProteinsActivities of Daily LivingPsychiatric Status Rating ScalesApolipoprotein E4Lewy BodiesMemoryRisk FactorsNeurofibrillary TanglesAmnesiaFrontotemporal Lobar DegenerationLanguage DisordersCohort StudiesPick Disease of the BrainDisease ProgressionBehavioral SymptomsHomes for the AgedCholinesterase InhibitorsAmyloid beta-PeptidesPsychomotor AgitationTemporal LobeFollow-Up StudiesAge FactorsPrevalenceNootropic AgentsProspective StudiesFrontal LobeAnalysis of VarianceHippocampusExecutive FunctionPlaque, AmyloidCase-Control StudiesInstitutionalizationCross-Sectional StudiesAge of OnsetTime FactorsVision DisordersMental CompetencyCerebral CortexWandering BehaviorAutopsyNeurodegenerative DiseasesMaze LearningDelirium, Dementia, Amnestic, Cognitive DisordersAphasia, Primary ProgressiveReproducibility of ResultsDepressionAphasiaIncidenceResidential FacilitiesVisually Impaired PersonsPredictive Value of TestsPsychometricsDeliriumEducational StatusCerebrovascular DisordersPsychomotor PerformanceBrief Psychiatric Rating ScaleComorbidityHearing LossApathyPsychological TestsLanguage TestsSupranuclear Palsy, ProgressiveQuestionnairesAgnosiaMental RecallBehaviorQuality of LifeDisability EvaluationDisease Models, AnimalDiagnostic Techniques, NeurologicalApolipoproteins EBrain DiseasesGeriatric NursingHallucinationsRetrospective StudiesMemantineStrokeLearning Disorders