Receptors, N-Methyl-D-AspartateGlutamic AcidReceptors, AMPAN-MethylaspartateExcitatory Amino Acid AntagonistsDizocilpine Maleate2-Amino-5-phosphonovalerateHippocampusalpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic AcidNeuronsSynapsesExcitatory Amino Acid AgonistsQuinoxalinesRats, Sprague-DawleySynaptic TransmissionLong-Term PotentiationNeuronal PlasticityPatch-Clamp TechniquesExcitatory Postsynaptic Potentials6-Cyano-7-nitroquinoxaline-2,3-dioneGlycineMemantineReceptors, Kainic AcidKainic AcidExcitatory Amino Acid AgentsKetamineReceptors, GlutamateProtein SubunitsPyramidal CellsAnimals, NewbornKynurenic AcidElectric StimulationCells, CulturedCerebral CortexLong-Term Synaptic DepressionPiperidinesBenzothiadiazinesDendritesRats, WistarElectrophysiologyPhencyclidineReceptors, NeurotransmitterCalciumDose-Response Relationship, DrugReceptors, Metabotropic GlutamateGuanylate KinaseMembrane PotentialsNeurotoxinsCycloserineSpinal Cord