Limbic SystemMamillary BodiesAgeusiaAmygdalaBrainNeural PathwaysFornix, BrainMagnetic Resonance ImagingHippocampusDiencephalonEmotionsFearBrain MappingBehavior, AnimalAnterior Thalamic NucleiNeuronsThalamusGyrus CinguliRats, Sprague-DawleyProto-Oncogene Proteins c-fosSeptum PellucidumImage Processing, Computer-AssistedBasal GangliaFacial ExpressionPrefrontal CortexRats, Long-EvansPonsCerebral CortexMemoryRewardFunctional LateralityTemporal LobeNerve NetConditioning, ClassicalBrain StemAnalysis of VarianceAutoradiographyNucleus AccumbensConditioning (Psychology)Neuropsychological TestsHypothalamusTime FactorsSeizuresRats, WistarElectroencephalographyFrontal LobeAvoidance LearningFreezing Reaction, CatalepticAnimals, NewbornIn Situ HybridizationExtinction, PsychologicalRats, Inbred StrainsElectroshockCerebrovascular CirculationAnxietySeptal NucleiImmunohistochemistryKindling, NeurologicAssociation LearningRNA, Messenger