TetrodotoxinSaxitoxinSodium Channel BlockersSodium ChannelsVeratridineAction PotentialsSodiumMembrane PotentialsElectric StimulationAtropineTetraodontiformesMuscle ContractionGuinea PigsMuscle, SmoothFishes, PoisonousProtoveratrinesVeratrinePotassiumElectrophysiologyNeuronsCalciumGuanethidineIon ChannelsSynaptic TransmissionTetraethylammonium CompoundsHexamethonium CompoundsAnesthetics, LocalIleumHexamethoniumPoisonsRats, Sprague-DawleyElectric ConductivityPatch-Clamp TechniquesToxins, BiologicalTime FactorsAcetylcholineDose-Response Relationship, DrugProcaineNeurilemmaLidocaineAxonsBatrachotoxinsAnuraRana esculentaMarine ToxinsMuscle RelaxationCalcium Channel BlockersDecapodiformesGastrointestinal MotilityNorepinephrineRats, WistarNeurotransmitter Agentsgamma-Aminobutyric AcidAconitineColonNeuromuscular JunctionSerotoninMyenteric PlexusCnidarian VenomsNeurotoxinsMusclesConotoxinsTetraethylammoniumScorpion VenomsCesiumMethysergideExcitatory Amino Acid AntagonistsGABA AntagonistsNAV1.8 Voltage-Gated Sodium Channel6-Cyano-7-nitroquinoxaline-2,3-dioneVasoactive Intestinal PeptideRanvier's NodesNeuromuscular Depolarizing AgentsEnteric Nervous SystemSynapsesTubocurarineNerve EndingsPhentolamineMuscle DenervationEvoked PotentialsNeural ConductionSubstance PMicroelectrodesAnimals, NewbornVoltage-Gated Sodium ChannelsApamin4-AminopyridineNifedipineElectrophorusCrustaceaNAV1.2 Voltage-Gated Sodium ChannelPhysostigmineCarbacholHippocampusBicucullineGastric FundusPleurobranchaeaParasympathetic Nervous SystemChloridesSynaptosomes