Memory DisordersMemoryNeuropsychological TestsCognition DisordersMemory, Short-TermImmunologic MemoryMemory, Long-TermMemory, EpisodicMental RecallProblem SolvingMaze LearningRetention (Psychology)Recognition (Psychology)HippocampusLearningAssociation LearningVerbal LearningAmnesiaFearCognitionSpatial BehaviorAvoidance LearningReaction TimeConditioning (Psychology)Magnetic Resonance ImagingAnalysis of VarianceTime FactorsCD8-Positive T-LymphocytesSocial ProblemsBrainAttentionPsychomotor PerformanceConditioning, ClassicalBehavior, AnimalBrain MappingPrefrontal CortexCuesMice, Inbred C57BLTemporal LobeAmygdalaPhotic StimulationRepression, PsychologyAgingAmnesia, RetrogradeNeuronal PlasticityCD4-Positive T-LymphocytesLearning DisordersPattern Recognition, VisualLong-Term PotentiationChild Behavior DisordersExploratory BehaviorPaired-Associate Learning