Body TemperatureBody Temperature RegulationTemperatureCold TemperatureHot TemperatureSkin TemperatureHypothermiaThermometersFeverBrain ChemistryHibernationBrain InjuriesTelemetryShiveringBrain NeoplasmsThermographyCircadian RhythmBrain MappingBrainSciuridaeTime FactorsBrain IschemiaHypothermia, InducedHumidityThermogenesisThermometrySweatingHeat Stress DisordersSeasonsHeatingBrain StemAntipyreticsBrain EdemaBehavior, AnimalOphthalmic SolutionsImmersionHypothalamusRats, Sprague-DawleyPreoptic AreaPyrogensEnergy MetabolismThermosensingMotor ActivityRectumHydrogen-Ion ConcentrationCerebral VentriclesMagnetic Resonance ImagingIncubators, InfantHeat StrokeHeart RateWaterSleepKineticsAnalysis of VarianceOxygen ConsumptionNeuronsBasal MetabolismAdaptation, PhysiologicalEatingN-Methyl-3,4-methylenedioxyamphetamineInfrared RaysThermoreceptorsMolecular Sequence DataThermodynamicsRespirationBrain AbscessHyperthermia, InducedRats, WistarTransition TemperatureInjections, IntraventricularThermal ConductivityCold ClimateStress, PhysiologicalCarbon DioxideMice, Inbred C57BLDisease Models, AnimalRewarmingCerebral CortexAnimals, NewbornClothingBeluga WhaleLizardsWakefulnessEar CanalClimateDose-Response Relationship, DrugBody WeightModels, BiologicalEnvironment, ControlledAdipose Tissue, BrownAirMytilusDimensional Measurement AccuracyAlligators and CrocodilesComb and WattlesMutationEnvironmentLightCattleSpecies Specificity