Autonomic Nervous SystemAutonomic Nervous System DiseasesHeart RateCentral Nervous SystemParasympathetic Nervous SystemSympathetic Nervous SystemNervous SystemGanglionic BlockersAutonomic DenervationVagus NerveAutonomic PathwaysAutonomic AgentsGalvanic Skin ResponseAutonomic Nerve BlockArrhythmia, SinusCardiovascular Physiological ProcessesBlood PressureElectrocardiographyElectrocardiography, AmbulatoryCentral Nervous System DiseasesEnteric Nervous SystemAtropineTrimethaphanPeripheral Nervous SystemDysautonomia, FamilialPropranololHeartCardiovascular SystemBrainCardiovascular Physiological PhenomenaBaroreflexHexamethoniumCircadian RhythmParasympatholyticsMuscarinic AntagonistsParasympathectomyValsalva ManeuverCentral Nervous System NeoplasmsGanglia, AutonomicNorepinephrineGlycopyrrolateCatecholaminesChlorisondamineNeuronsArrhythmias, CardiacMassagePancreatic PolypeptideHypoventilationPsychophysiologyAdrenergic AgentsNervous System Physiological PhenomenaOxymetazolineShy-Drager SyndromeTime FactorsNeurosecretory SystemsDogsBradycardiaCardiography, ImpedanceSupine PositionAdrenergic beta-AntagonistsRelaxationTilt-Table TestPeripheral NervesStress, PsychologicalVagus Nerve StimulationNervous System DiseasesSignal Processing, Computer-AssistedCentral Nervous System InfectionsHemodynamicsRespirationAtrial FunctionTelemetryNeuroimmunomodulationMagnetocardiographyEpinephrineAdrenergic FibersHead-Down TiltPressoreceptorsSympathectomyArousalHeart Rate, FetalNervous System NeoplasmsAnalysis of VarianceRespiratory RateAdrenergic NeuronsHeart Conduction SystemAdrenergic AgonistsHypotension, OrthostaticReflexAdrenergic AntagonistsDisease Models, AnimalGanglia, SympatheticHexamethonium CompoundsNerve Tissue ProteinsHypothalamusGanglionic StimulantsRats, WistarSympathetic Fibers, PostganglionicElectroacupunctureReflex, Abnormal