Excitatory Postsynaptic PotentialsGap JunctionsIntercellular JunctionsTight JunctionsSynapsesNeuromuscular JunctionSynaptic TransmissionAdherens JunctionsPresynaptic TerminalsSynaptic MembranesInhibitory Postsynaptic PotentialsNeuronsPost-Synaptic DensityHippocampusPatch-Clamp TechniquesElectric StimulationNeural InhibitionReceptors, AMPANeuronal PlasticityReceptors, N-Methyl-D-Aspartategamma-Aminobutyric AcidSynaptic PotentialsConnexinsDendritesLong-Term PotentiationMiniature Postsynaptic PotentialsRats, Sprague-DawleyPyramidal CellsElectrophysiologyAction PotentialsGlutamic AcidGuanylate KinaseExcitatory Amino Acid AntagonistsMembrane ProteinsConnexin 43Receptors, CholinergicReceptors, PresynapticInterneuronsReceptors, GlutamateGABA AntagonistsZonula Occludens-1 ProteinEvoked PotentialsMembrane PotentialsEsophagogastric JunctionReceptors, GABA-ANerve Tissue ProteinsOccludinNeurotransmitter AgentsDendritic SpinesFreeze Fracturing6-Cyano-7-nitroquinoxaline-2,3-dioneTight Junction Proteins2-Amino-5-phosphonovalerateAnimals, NewbornHolliday Junction ResolvasesMotor NeuronsReceptors, GABA-BCells, CulturedMicroscopy, ElectronBicucullineRats, WistarCalciumLong-Term Synaptic DepressionAgrinReceptors, Metabotropic GlutamateTetrodotoxinCell CommunicationSynaptic VesiclesModels, NeurologicalCadherinsQuinoxalinesOrgan Culture TechniquesAxonsMotor EndplatePhosphinic AcidsPurkinje CellsReceptors, NeurotransmitterMolecular Sequence DataExcitatory Amino Acid AgonistsTime FactorsGABA-A Receptor AntagonistsNeocortexN-MethylaspartateImmunohistochemistryPicrotoxinBaclofenNerve EndingsSpinal CordCerebellumDNA, CruciformIntracellular Signaling Peptides and ProteinsGABA AgonistsCell Adhesion Molecules, NeuronalGABA-B Receptor AntagonistsNeural PathwaysClaudin-1Mice, Inbred C57BLMicroscopy, ImmunoelectronReceptors, GABAMicroscopy, Confocal