Infant BehaviorSupine PositionTemperamentCryingProne PositionSucking BehaviorMother-Child RelationsInfant CareMaternal BehaviorInfant, PrematureObject AttachmentPatient PositioningInfant, NewbornPostureChild DevelopmentChild BehaviorMothersBehavior, AnimalInfant, Premature, DiseasesTilt-Table TestInfant FoodSudden Infant DeathFeeding BehaviorHead-Down TiltHeart RateInfant FormulaSupinationHypotension, OrthostaticGravitationNephrostomy, PercutaneousInfant MortalitySocial BehaviorBlood PressureInfant, Newborn, DiseasesHealth BehaviorRespiratory MechanicsBehaviorInfant Nutritional Physiological PhenomenaRespirationTime FactorsAutonomic Nervous SystemMovementInfant, Very Low Birth WeightSexual BehaviorIndoraminInfant, Low Birth WeightValsalva ManeuverPressureSexual Behavior, AnimalPregnancySyncopeSleepBaroreflexDizzinessTidal VolumeReference ValuesHemodynamicsHeadProspective StudiesExploratory BehaviorSyncope, VasovagalExpiratory Reserve VolumeCardiac OutputOxygenLegPulmonary Gas ExchangeBedsBreast FeedingLung Volume MeasurementsAdolescent BehaviorInfant WelfareFluid ShiftsEsophagusFunctional Residual CapacityChild Behavior DisordersEsophageal pH MonitoringPulmonary CirculationRestPalate, SoftTechnetium Tc 99m Aggregated AlbuminAnalysis of VarianceLungMolecular Sequence DataBehavior TherapyRespiration, ArtificialThoracic WallBlood Flow VelocityInfant, Extremely Low Birth WeightInhalationCarbon DioxideSleep ParalysisPharynxRibsAirway ResistanceDiaphragmReproducibility of ResultsPlethysmography