Action PotentialsGangliaGanglia, SpinalRetinal Ganglion CellsBasal GangliaGanglia, SympatheticGanglia, AutonomicTrigeminal GanglionGanglia, ParasympatheticGanglia, SensoryElectrophysiologyMembrane PotentialsNeuronsPatch-Clamp TechniquesElectric StimulationTetrodotoxinStellate GanglionNodose GanglionAxonsGuinea PigsSodium ChannelsCalciumSpiral GanglionNeural ConductionPotassium ChannelsGanglia, InvertebrateVentricular FunctionSynaptic TransmissionNeurons, AfferentHeartPotassiumDendritesSynapsesHeart Conduction SystemSuperior Cervical GanglionMicroelectrodesElectric ConductivityPapillary Muscles4-AminopyridineRats, Sprague-DawleyTime FactorsSodiumHeart VentriclesPyramidal CellsTetraethylammonium CompoundsPotassium Channel BlockersPurkinje FibersSodium Channel BlockersBasal Ganglia DiseasesModels, NeurologicalExcitatory Postsynaptic PotentialsRetinaPotassium Channels, Voltage-GatedGeniculate GanglionRefractory Period, ElectrophysiologicalEvoked PotentialsIon ChannelsAnti-Arrhythmia AgentsMyocytes, CardiacModels, CardiovascularCalcium ChannelsTetraethylammoniumArrhythmias, CardiacMotor NeuronsDogsSensory Receptor CellsCatsAnimals, NewbornRats, WistarDelayed Rectifier Potassium ChannelsCells, CulturedIon Channel GatingNeural InhibitionCalcium Channels, L-TypeMyocardiumInterneuronsHeart AtriaRabbitsElectrophysiological PhenomenaMyocardial ContractionNeurotransmitter AgentsSinoatrial NodeCalcium SignalingNerve FibersCalcium Channel BlockersVoltage-Sensitive Dye ImagingOptic NerveReaction TimeAtrial FunctionPresynaptic TerminalsAnuragamma-Aminobutyric AcidEndocardiumHippocampusSciatic NerveComputer SimulationPericardiumLeechesAutonomic Fibers, PreganglionicBarium