HippocampusCA3 Region, HippocampalAssociation LearningMemoryCA1 Region, HippocampalPerforant PathwayParahippocampal GyrusMemory DisordersMagnetic Resonance ImagingDentate GyrusRecognition (Psychology)NeuronsBrain MappingPyramidal CellsRats, Sprague-DawleyTemporal LobeBrainReceptors, N-Methyl-D-AspartateRats, WistarRats, Long-EvansSynaptic TransmissionExcitatory Postsynaptic PotentialsModels, NeurologicalAlzheimer DiseaseBehavior, AnimalImage Processing, Computer-AssistedNeural PathwaysAnimals, NewbornReference ValuesNerve NetAction PotentialsElectric StimulationPhotic StimulationAnalysis of VarianceImmunohistochemistrySynapsesNeuropsychological TestsTime Factors