TetrodotoxinSaxitoxinSodium Channel BlockersSodium ChannelsVeratridineAction PotentialsSodiumMembrane PotentialsElectric StimulationAtropineTetraodontiformesGuinea PigsTreatment OutcomeMuscle ContractionMuscle, SmoothFishes, PoisonousProtoveratrinesVeratrineDose-Response Relationship, DrugElectrophysiologyPotassiumNeuronsCalciumSynaptic TransmissionAnesthetics, LocalGuanethidineIon ChannelsTime FactorsTetraethylammonium CompoundsRats, Sprague-DawleyHexamethonium CompoundsIleumHexamethoniumPoisonsPatch-Clamp TechniquesElectric ConductivityLidocaineToxins, BiologicalAcetylcholineProcaineNeurilemmaDouble-Blind MethodAxonsBatrachotoxinsMarine ToxinsAnuraRana esculentaMuscle Relaxationgamma-Aminobutyric AcidRats, WistarNeurotransmitter AgentsGastrointestinal MotilityDecapodiformesCalcium Channel BlockersAconitineNorepinephrineColonNeuromuscular JunctionSerotoninNeurotoxinsMyenteric PlexusDrug Therapy, CombinationConotoxinsScorpion VenomsCnidarian VenomsSynapsesTetraethylammoniumExcitatory Amino Acid AntagonistsMusclesGABA Antagonists6-Cyano-7-nitroquinoxaline-2,3-dioneCesiumMethysergideNAV1.8 Voltage-Gated Sodium ChannelVasoactive Intestinal PeptideRanvier's NodesNeuromuscular Depolarizing AgentsNerve EndingsEnteric Nervous SystemEvoked PotentialsTubocurarineMuscle DenervationSerotonin AntagonistsPhentolamine4-AminopyridineCells, CulturedNeural ConductionNAV1.2 Voltage-Gated Sodium ChannelMicroelectrodesSubstance PAnimals, NewbornVoltage-Gated Sodium ChannelsDrug Administration ScheduleApaminNifedipineDrug InteractionsElectrophorusHippocampusCarbacholBicuculline