Autonomic Fibers, PostganglionicAutonomic Nervous SystemAutonomic Fibers, PreganglionicSympathetic Fibers, PostganglionicAutonomic Nervous System DiseasesParasympathetic Nervous SystemHeart RateSympathetic Nervous SystemCentral Nervous SystemGanglionic BlockersVagus NerveParasympathetic Fibers, PostganglionicGanglia, ParasympatheticGanglia, SympatheticNerve FibersGanglia, AutonomicNervous SystemHexamethonium CompoundsAtropineAutonomic DenervationAutonomic PathwaysBlood PressureNorepinephrineAutonomic AgentsGalvanic Skin ResponseBretylium CompoundsElectric StimulationAutonomic Nerve BlockHeartArrhythmia, SinusHexamethoniumDietary FiberHorner SyndromeMuscle Fibers, SkeletalNeuronsPempidineParasympatholyticsAdrenergic FibersSuperior Cervical GanglionSympathectomyCardiovascular Physiological ProcessesElectrocardiographyChlorisondamineDenervationPropranololElectrocardiography, AmbulatoryCentral Nervous System DiseasesEnteric Nervous SystemPeripheral Nervous SystemTrimethaphanGuanethidineBaroreflexDysautonomia, FamilialReflexPentolinium TartrateCatecholaminesDogsBrainTime FactorsCardiovascular SystemMineral FibersGangliaPressoreceptorsHypotension, OrthostaticCardiovascular Physiological PhenomenaAcetylcholineHypogastric PlexusMuscarinic AntagonistsCircadian RhythmParasympathectomyValsalva ManeuverCentral Nervous System NeoplasmsStellate GanglionAxonsPharmacologyRats, Sprague-DawleyCholinergic FibersCatsRats, WistarMuscle Fibers, Fast-TwitchEpinephrineMuscle Fibers, Slow-TwitchGlycopyrrolateCotton FiberSinoatrial NodePhentolamineAction PotentialsMassageHypohidrosisNeurotransmitter AgentsArrhythmias, CardiacNeuropeptide YSpinal CordPancreatic PolypeptideUrinary BladderPeripheral NervesReceptors, MuscarinicHypoventilationTailNervous System Physiological Phenomena