Sympathetic Nervous SystemHeart RateBlood PressureNorepinephrinePeroneal NerveSplanchnic NervesCentral Nervous SystemPressoreceptorsBaroreflexAutonomic Nervous SystemSympathectomy, ChemicalHead-Down TiltReflexMedulla OblongataEpinephrineDenervationKynurenic AcidCardiovascular SystemSympathectomyNervous SystemHemodynamicsChemoreceptor CellsKidneyHypertensionRats, Sprague-DawleyMuscimolCold TemperatureInjections, IntraventricularElectric StimulationMicroinjectionsAutonomic Nervous System DiseasesMuscle, SkeletalHand StrengthNitroprussidePhenylephrineCatecholaminesSympatholyticsVasoconstrictionGanglionic BlockersCentral Nervous System DiseasesTime FactorsPeripheral Nervous SystemPentolinium TartrateGuanethidineSympathetic Fibers, PostganglionicAdrenergic FibersGanglia, SympatheticElectrocardiographyNervous System NeoplasmsHydroxydopaminesDose-Response Relationship, DrugStellate GanglionAdrenergic alpha-AntagonistsPropranololExerciseDopamine beta-HydroxylaseEnteric Nervous SystemCentral Nervous System NeoplasmsMuscle ContractionAdrenergic beta-AntagonistsSympathomimeticsNeuronsParasympathetic Nervous SystemReceptors, Adrenergic, betaBrainRenin-Angiotensin SystemPhentolamineNeuropeptide YAdrenal MedullaNeuroblastomaPrazosinHypertension, RenalReninHexamethonium Compounds3-IodobenzylguanidineBrazilAdipose Tissue, BrownReceptors, AdrenergicNervous System Physiological PhenomenaPhenoxybenzamineClonidineGanglioneuromaHeartAngiotensin IIReserpineHypothalamo-Hypophyseal SystemHexamethoniumPituitary-Adrenal SystemHypothalamusOxidopamineGanglia, AutonomicTrimethaphanSuperior Cervical GanglionStress, PhysiologicalCentral Nervous System InfectionsLeptinAdrenal GlandsGalvanic Skin ResponseHypothalamus, PosteriorReceptors, Adrenergic, alpha-2