Membrane PotentialsConstrictionVasoconstrictionConstriction, PathologicCalciumPotassiumElectrophysiologyAction PotentialsCortical Spreading DepressionArteriolesPatch-Clamp TechniquesElectric StimulationTetrodotoxinPotassium ChlorideRats, Sprague-DawleyNeuronsGuinea PigsElectric ConductivitySodiumNeuromuscular Depolarizing AgentsIon ChannelsCalcium Channel BlockersCalcium ChannelsPotassium ChannelsVasoconstrictor AgentsTime FactorsDuctus ArteriosusMuscle ContractionMuscle, Smooth, VascularIon Channel GatingAcetylcholineRats, WistarNifedipineCalcium SignalingDose-Response Relationship, DrugTetraethylammoniumPotassium Channel BlockersBariumNorepinephrineSynaptic TransmissionTetraethylammonium Compounds4-AminopyridineChloridesReflex, PupillaryMuscle, SmoothSodium ChannelsDogsCells, CulturedCalcium Channels, L-TypeMuscle TonusMicroelectrodesBronchoconstrictionSynapsesEvoked PotentialsAmniotic Band SyndromeMesenteric ArteriesCerebral ArteriesVasodilationPupilCell MembraneCatsSerotoninRabbitsEgtazic AcidKineticsEnzyme InhibitorsPhenylephrineVeratridineMitochondriaFluorescent Dyesgamma-Aminobutyric AcidHeartPericarditis, ConstrictiveAnimals, NewbornCardiomegalyPressureMembrane Potential, Mitochondrial15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidArteriesCaffeineCesiumVasomotor SystemCell Membrane PermeabilityPia MaterMyocardiumExtracellular SpaceCarbacholMuscarineVascular ResistanceMusclesExcitatory Postsynaptic PotentialsGanglia, SympatheticNeurons, AfferentGlutamic AcidPerfusionHippocampusCoronary VesselsMotor NeuronsAtropineAdenosine Triphosphate