Supine PositionProne PositionPatient PositioningPostureSudden Infant DeathBehavior, AnimalTilt-Table TestHead-Down TiltFeeding BehaviorHeart RateSupinationHypotension, OrthostaticNephrostomy, PercutaneousGravitationHealth BehaviorSocial BehaviorBlood PressureRespiratory MechanicsBehaviorAutonomic Nervous SystemRespirationSexual BehaviorBedsIndoraminMovementSleepValsalva ManeuverSexual Behavior, AnimalPressureTime FactorsSyncopeBaroreflexDizzinessChild BehaviorHemodynamicsSyncope, VasovagalExploratory BehaviorExpiratory Reserve VolumeCardiac OutputTidal VolumeLegPulmonary Gas ExchangeAdolescent BehaviorFluid ShiftsReference ValuesHeadLung Volume MeasurementsOxygenMolecular Sequence DataPalate, SoftTechnetium Tc 99m Aggregated AlbuminRestEsophagusEsophageal pH MonitoringPulmonary CirculationChild Behavior DisordersMaternal BehaviorBehavior TherapyThoracic WallSleep ParalysisFunctional Residual CapacityLungBlood Flow VelocityCarbon DioxideInhalationDiaphragmRibsPharynxAutonomic Nervous System DiseasesStereotyped BehaviorExerciseAnalysis of VarianceProspective StudiesAirway ResistancePlethysmographyElectrocardiographyVentilators, Negative-PressureCentral Venous PressureReproducibility of ResultsInfant, NewbornPneumoperitoneum, ArtificialTongueRegional Blood FlowPolysomnographyVenous PressurePelvisLymphatic IrradiationEsophageal Motility DisordersAirway ObstructionAmino Acid SequencePulmonary VentilationInfant CareVeinsRespiratory MusclesTotal Lung CapacitySpineBlood VolumeSleep Apnea, ObstructiveBiomechanical PhenomenaVascular Resistance