Receptors, NicotinicPresynaptic TerminalsReceptors, PresynapticSynaptic TransmissionSynapsesExcitatory Amino Acid AntagonistsExcitatory Postsynaptic PotentialsRats, Sprague-DawleyNeurotransmitter AgentsElectric StimulationNeural InhibitionGABA AntagonistsNeuronsSynaptic VesiclesHormone AntagonistsDopamine AntagonistsPatch-Clamp TechniquesHippocampusGlutamic AcidDose-Response Relationship, DrugNarcotic Antagonistsgamma-Aminobutyric AcidNeuromuscular JunctionNeurokinin-1 Receptor AntagonistsCalciumRats, WistarMuscarinic AntagonistsPiperidinesHistamine H2 AntagonistsAction PotentialsNeuronal PlasticityInterleukin 1 Receptor Antagonist ProteinReceptors, GABA-BPurinergic P1 Receptor AntagonistsNicotinic AntagonistsReceptors, N-Methyl-D-AspartateElectrophysiologyCalcium Channel BlockersBaclofenGABA-A Receptor AntagonistsSynaptosomesHistamine H1 AntagonistsReceptors, Metabotropic GlutamateAdenosine A2 Receptor AntagonistsHistamine AntagonistsPurinergic P2 Receptor AntagonistsCells, CulturedSynaptic MembranesGABA-B Receptor AntagonistsAdrenergic alpha-1 Receptor AntagonistsNerve EndingsAdrenergic alpha-2 Receptor AntagonistsMossy Fibers, HippocampalInhibitory Postsynaptic PotentialsAdenosine A1 Receptor AntagonistsAdrenergic alpha-AntagonistsLong-Term PotentiationMembrane PotentialsExcitatory Amino Acid AgonistsNerve Tissue ProteinsSynaptophysin6-Cyano-7-nitroquinoxaline-2,3-dioneSerotonin 5-HT2 Receptor AntagonistsTime FactorsQuinoxalinesSynapsinsTetrodotoxinInterneuronsAnimals, NewbornNorepinephrineSerotonin 5-HT3 Receptor Antagonists2-Amino-5-phosphonovalerateSerotoninCalcium Channels, N-TypeMotor NeuronsReceptors, AMPAGABA AgonistsBicucullineDopamineGuinea PigsSynaptic PotentialsReceptors, SerotoninYohimbineAcetylcholineDrug InteractionsNeurons, AfferentPhosphinic AcidsReceptor, Cannabinoid, CB1Pyramidal CellsDizocilpine MaleatePyridinium CompoundsCalcium ChannelsReceptors, GlutamateAxonsLeukotriene AntagonistsAngiotensin Receptor AntagonistsAdrenergic AntagonistsMiniature Postsynaptic PotentialsSpinal CordN-Methylaspartate