Amnesia, RetrogradeAmnesiaDeliriumAmnesia, AnterogradeDementiaCognition DisordersAlcohol Amnestic DisorderRetention (Psychology)MemoryNeuropsychological TestsHistamine H3 AntagonistsMemory DisordersAmnesia, Transient GlobalElectroconvulsive TherapyReceptors, Histamine H3Mental RecallMild Cognitive ImpairmentHippocampusAlzheimer DiseaseTemporal LobeDementia, VascularNootropic AgentsBrainCognitionDelirium, Dementia, Amnestic, Cognitive DisordersHistamine AntagonistsRats, Long-EvansMagnetic Resonance ImagingNervous System DiseasesMaze Learning