SynapsesAction PotentialsElectrical SynapsesLeechesSynaptic TransmissionNeuronsGap JunctionsElectrophysiologyElectric StimulationInterneuronsExcitatory Postsynaptic PotentialsSynaptic VesiclesSynaptic MembranesNeurotransmitter AgentsMembrane PotentialsNeocortexGoldfishPresynaptic TerminalsMotor NeuronsNerve NetModels, NeurologicalGanglia, InvertebrateNeuromuscular JunctionImmunological SynapsesPatch-Clamp TechniquesCalciumElectric ConductivityTetrodotoxinDendritesAxonsHippocampusPyramidal CellsNeuronal PlasticityGuinea PigsSodium ChannelsNeural ConductionPotassium ChannelsVentricular FunctionNeural InhibitionPotassiumRats, Sprague-DawleyTime FactorsHeartHeart Conduction SystemMicroelectrodes4-AminopyridinePapillary MusclesAnimals, NewbornEvoked Potentialsgamma-Aminobutyric AcidNeurons, AfferentReceptors, AMPASodiumHeart VentriclesCells, CulturedLong-Term PotentiationReceptors, N-Methyl-D-AspartatePotassium Channel BlockersPurkinje FibersRats, WistarSodium Channel BlockersTetraethylammonium CompoundsExcitatory Amino Acid AntagonistsGlutamic AcidDendritic SpinesCalcium ChannelsSynaptic PotentialsPotassium Channels, Voltage-GatedPurkinje CellsRefractory Period, ElectrophysiologicalIon ChannelsCalcium SignalingMyocytes, CardiacAnti-Arrhythmia AgentsModels, CardiovascularArrhythmias, CardiacNerve FibersTetraethylammoniumNerve Tissue ProteinsDogsComputer SimulationDelayed Rectifier Potassium ChannelsIon Channel GatingElectrophysiological PhenomenaMossy Fibers, HippocampalAplysiaCalcium Channel BlockersInhibitory Postsynaptic PotentialsOrgan Culture TechniquesGABA AntagonistsMyocardiumCalcium Channels, L-TypeCerebellumMyocardial ContractionLong-Term Synaptic DepressionKineticsHeart AtriaRabbitsCatsPyridinium Compounds