Neuronal PlasticityLong-Term PotentiationSynapsesHippocampusLong-Term Synaptic DepressionSynaptic TransmissionExcitatory Postsynaptic PotentialsReceptors, N-Methyl-D-AspartateNeuronsDendritic SpinesReceptors, AMPAMemoryLearningElectric StimulationDendritesTime FactorsCA1 Region, HippocampalRats, Sprague-DawleyModels, NeurologicalBrain-Derived Neurotrophic FactorPatch-Clamp TechniquesMaze LearningPyramidal CellsExcitatory Amino Acid AntagonistsCalcium-Calmodulin-Dependent Protein Kinase Type 2FearNerve Tissue ProteinsMice, Inbred C57BLPresynaptic TerminalsDentate GyrusAction PotentialsMice, KnockoutBehavior, AnimalNeural InhibitionReceptors, Metabotropic GlutamateElectrophysiologyOrgan Culture TechniquesSynaptic PotentialsBrainAmygdalaConditioning (Psychology)Analysis of VarianceConditioning, ClassicalNeural Pathways2-Amino-5-phosphonovalerateSignal TransductionAnimals, NewbornNerve NetRats, WistarGlutamic AcidPerforant PathwayCells, CulturedReceptor, trkBDominance, OcularCritical Period (Psychology)N-MethylaspartateAplysiaCalciumCerebral CortexMice, TransgenicMemory, Long-TermSynaptophysinReceptors, GlutamatePurkinje CellsRats, Long-EvansPost-Synaptic DensityCerebellumBiophysicsGene Expression RegulationGuanylate KinaseVisual CortexExcitatory Amino Acid AgonistsMemory DisordersTheta RhythmDisease Models, AnimalAdaptation, PhysiologicalCannabinoid Receptor ModulatorsInterneuronsSynapsinsNeurotransmitter AgentsGABA AntagonistsGAP-43 ProteinCalcium SignalingPhosphorylationAgingCorpus StriatumExcitatory Amino Acid AgentsModels, BiologicalMossy Fibers, HippocampalGreen Fluorescent ProteinsSpatial BehaviorEndocannabinoidsInhibitory Postsynaptic PotentialsNeocortexFragile X Mental Retardation ProteinTreatment OutcomeCA3 Region, HippocampalProtein TransportSomatosensory CortexVibrissae