Body TemperatureHypothermia, InducedHypothermiaBody Temperature RegulationTemperatureCold TemperatureHot TemperatureRewarmingSkin TemperatureFeverThermometersShiveringHibernationTelemetryHypoxia-Ischemia, BrainThermographyHeart ArrestCircadian RhythmTime FactorsSciuridaeHeatingThermogenesisSweatingCirculatory Arrest, Deep Hypothermia InducedImmersionThermometryHumiditySeasonsHeat Stress DisordersHyperthermia, InducedMotor ActivityAntipyreticsEnergy MetabolismPreoptic AreaRectumInjections, IntraventricularBrainHeart RateAsphyxia NeonatorumPyrogensBehavior, AnimalRats, Sprague-DawleyHypothalamusThermosensingOxygen ConsumptionCardiopulmonary ResuscitationCerebral VentriclesN-Methyl-3,4-methylenedioxyamphetamineIncubators, InfantBasal MetabolismHeat StrokeBrain IschemiaHydrogen-Ion ConcentrationCarbon DioxideRespirationSleepAdipose Tissue, BrownWaterComaThermoreceptorsAdaptation, PhysiologicalEatingInfrared RaysBrain InjuriesCold-Shock ResponseThermodynamicsDisease Models, AnimalAnalysis of VarianceRats, WistarTransition TemperatureExtracorporeal CirculationThermal ConductivityCold ClimateStress, PhysiologicalCardiopulmonary BypassHeart Arrest, InducedAsphyxiaClothingDose-Response Relationship, DrugBeluga WhaleTympanic MembraneKineticsWakefulnessClimateLizardsAnesthesiaEar CanalBody WeightEnvironment, ControlledAcclimatizationMytilusDimensional Measurement AccuracyElectroencephalographySwineAlligators and CrocodilesAcetaminophenComb and WattlesTreatment OutcomePentobarbitalAir