AbsorptionIntestinal AbsorptionSpectrum AnalysisAutonomic Nervous SystemFourier AnalysisSignal Processing, Computer-AssistedHeart RateSpectrophotometryMagnetic Resonance SpectroscopySpectrophotometry, InfraredSpectrophotometry, UltravioletBaroreflexElectroencephalographyMass SpectrometryMolecular StructureSkin AbsorptionSpectrum Analysis, RamanSpectrometry, Mass, Fast Atom BombardmentElectrocardiographyBiological AvailabilityDelta RhythmSympathetic Nervous SystemParasympathetic Nervous SystemChromatography, High Pressure LiquidSleep StagesTime FactorsPeriodicityKineticsSupine PositionSpectrophotometry, AtomicAlgorithmsVagus NerveSpectrometry, FluorescenceBlood PressureSound SpectrographyX-Ray Absorption SpectroscopyAutonomic Nervous System DiseasesElectroencephalography Phase SynchronizationJejunumGlycosidesRespirationCircular DichroismOscillometryAlpha RhythmLightMolecular ConformationHydrogen-Ion ConcentrationIronCircadian RhythmHeart SoundsOxidation-ReductionPostureBeta RhythmFractalsReference ValuesValsalva ManeuverReproducibility of ResultsElectron Spin Resonance SpectroscopyPlant ExtractsElectrocardiography, AmbulatoryIntestine, SmallMolecular Sequence DataTelemetrySleep, REMChemistry, PhysicalSleepRetinal PigmentsPhysicochemical PhenomenaAmino Acid SequenceHemePolysomnographyTilt-Table TestWakefulnessZincModels, BiologicalFermentationPhytic AcidChemistryGas Chromatography-Mass SpectrometryZinc RadioisotopesChemical PhenomenaStereoisomerismAutonomic Nerve BlockAdministration, OralWaterTremorProtein ConformationSpectrometry, Mass, Electrospray IonizationCattleNonlinear DynamicsIridoidsTemperatureModels, ChemicalIron RadioisotopesZinc IsotopesRats, Sprague-DawleyMicrospectrophotometrySpectral KaryotypingStreptomycesBepridil