Receptors, NicotinicPresynaptic TerminalsReceptors, PresynapticSynaptic TransmissionSynapsesExcitatory Amino Acid AntagonistsExcitatory Postsynaptic PotentialsNeurotransmitter AgentsRats, Sprague-DawleyElectric StimulationNeural InhibitionGABA AntagonistsNeuronsSynaptic VesiclesHormone AntagonistsDopamine AntagonistsPatch-Clamp TechniquesHippocampusGlutamic AcidDose-Response Relationship, DrugNarcotic Antagonistsgamma-Aminobutyric AcidNeurokinin-1 Receptor AntagonistsNeuromuscular JunctionCalciumMuscarinic AntagonistsRats, WistarPiperidinesHistamine 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 AntagonistsSynaptic MembranesGABA-B Receptor AntagonistsAdrenergic alpha-1 Receptor AntagonistsNerve EndingsCells, CulturedPurinergic P2 Receptor AntagonistsAdrenergic alpha-2 Receptor AntagonistsMossy Fibers, HippocampalInhibitory Postsynaptic PotentialsAdenosine A1 Receptor AntagonistsAdrenergic alpha-AntagonistsLong-Term PotentiationExcitatory Amino Acid AgonistsSynaptophysinMembrane Potentials6-Cyano-7-nitroquinoxaline-2,3-dioneSerotonin 5-HT2 Receptor AntagonistsNerve Tissue ProteinsSynapsinsQuinoxalinesInterneuronsTetrodotoxinAnimals, NewbornSerotonin 5-HT3 Receptor AntagonistsTime FactorsNorepinephrine2-Amino-5-phosphonovalerateCalcium Channels, N-TypeSerotoninMotor NeuronsReceptors, AMPAGABA AgonistsBicucullineDopamineSynaptic PotentialsReceptors, SerotoninGuinea PigsYohimbinePhosphinic AcidsReceptor, Cannabinoid, CB1AcetylcholinePyramidal CellsNeurons, AfferentDizocilpine MaleateDrug InteractionsPyridinium CompoundsCalcium ChannelsReceptors, GlutamateLeukotriene AntagonistsAxonsAngiotensin Receptor AntagonistsAdrenergic AntagonistsMiniature Postsynaptic PotentialsSpinal CordN-Methylaspartate