FearMagnetic Resonance ImagingEmotionsFacial ExpressionConditioning, ClassicalConditioning (Psychology)Neural PathwaysBrain MappingBehavior, AnimalBrainAvoidance LearningLimbic SystemMemoryRats, Long-EvansFreezing Reaction, CatalepticRats, Sprague-DawleyImage Processing, Computer-AssistedExtinction, PsychologicalIbotenic AcidPrefrontal CortexElectroshockFunctional LateralityAnalysis of VarianceHippocampusSeptal NucleiAnxietyNeuronsAssociation LearningKindling, NeurologicPhotic StimulationRewardProto-Oncogene Proteins c-fosCorticotropin-Releasing HormoneStartle ReactionMicroinjectionsLipoid Proteinosis of Urbach and WietheCuesTime FactorsArousalMuscimolReaction TimeFunctional NeuroimagingCerebral CortexPattern Recognition, VisualImmunohistochemistryFaceNeuronal PlasticityExploratory BehaviorAcoustic StimulationNerve NetGyrus CinguliDominance, CerebralDisease Models, AnimalConditioning, OperantStress, PsychologicalRats, WistarMaze LearningNeuronal Tract-TracersNeuropsychological TestsTemporal LobeReceptors, Corticotropin-Releasing HormoneThalamusPrecancerous ConditionsLong-Term PotentiationBrain DiseasesSocial BehaviorSynaptic TransmissionSocial PerceptionGalvanic Skin ResponseAffectElectric StimulationRecognition (Psychology)Mice, Inbred C57BLHappinessRestraint, PhysicalOncogene Proteins v-fosLearninggamma-Aminobutyric AcidSubliminal StimulationOlfactory PathwaysCorticosteroneReinforcement (Psychology)Retention (Psychology)TasteAnti-Anxiety AgentsNucleus AccumbensOxygenSubstance Withdrawal SyndromeEvoked PotentialsAngerReceptors, N-Methyl-D-AspartateHypothalamusMacaca mulattaTomography, X-Ray ComputedExcitatory Amino Acid AntagonistsSubstantia InnominataHabituation, PsychophysiologicSerotonin Plasma Membrane Transport ProteinsStereotaxic TechniquesElectrodes, Implanted