Long-Term PotentiationFearImprinting (Psychology)HippocampusCA1 Region, HippocampalReceptors, N-Methyl-D-AspartateNeuronal PlasticityMemorySynapsesSynaptic TransmissionLearningRats, Sprague-DawleyNeuronsRats, WistarPhosphorylationCalciumConditioning, ClassicalConditioning (Psychology)Freezing Reaction, CatalepticExtinction, PsychologicalEmotionsElectroshockFacial ExpressionElectric StimulationBehavior, AnimalTime FactorsAvoidance LearningAmygdalaExcitatory Postsynaptic PotentialsMagnetic Resonance ImagingRats, Long-EvansNeural PathwaysStartle ReactionAnalysis of VarianceDrug SynergismAnxietyAssociation LearningPrefrontal CortexBrainLimbic SystemBrain MappingGalvanic Skin ResponseExcitatory Amino Acid AntagonistsReceptors, AMPAMaze LearningPatch-Clamp TechniquesCuesAcoustic StimulationElectrophysiologyDose-Response Relationship, DrugSeptal NucleiMice, Inbred C57BLEvoked PotentialsLong-Term Synaptic DepressionImage Processing, Computer-AssistedMicroinjections2-Amino-5-phosphonovalerateExploratory BehaviorFunctional LateralityMuscimolProto-Oncogene Proteins c-fosPhotic StimulationAction Potentialsgamma-Aminobutyric AcidKindling, NeurologicReaction TimeFollow-Up StudiesNeural InhibitionIbotenic AcidTetanyCerebral CortexDentate GyrusPyramidal CellsCorticotropin-Releasing HormoneNerve NetN-MethylaspartateStress, PsychologicalLong-Term CareArousalReceptors, GABA-ARewardReceptors, Metabotropic GlutamateGyrus CinguliGABA AntagonistsPerforant PathwayPhobic DisordersThalamusMice, KnockoutRetention (Psychology)Anti-Anxiety AgentsExcitatory Amino Acid AgonistsConditioning, OperantSynaptic PotentialsTreatment OutcomeLipoid Proteinosis of Urbach and WietheSocial BehaviorGlutamic AcidPattern Recognition, VisualCorticosteroneAnimals, Newborn