FaceIncubators, InfantHeatingSkin TemperatureInfrared RaysHot TemperatureWater Loss, InsensibleEnvironment, ControlledThermometersBody Temperature RegulationHyperalgesiaBody TemperatureNociceptorsProtective ClothingHumidityInjections, SpinalPhototherapyHypothermiaLasersPain MeasurementPainAnalgesicsAnalgesics, OpioidMorphinePhysical StimulationTemperatureRats, Sprague-DawleyNaloxoneFacial ExpressionReaction TimeSpinal CordSkinPattern Recognition, VisualLightInfant, NewbornRecognition (Psychology)CatsTime FactorsDose-Response Relationship, DrugProsopagnosiaPhotic StimulationVisual PerceptionEmotionsPerceptual DistortionBeautyHappinessMasksFigural AftereffectSocial PerceptionDiscrimination (Psychology)Brain MappingForm PerceptionMagnetic Resonance ImagingFacial NeoplasmsTemporal LobeFacial DermatosesOccipital LobeAngerFacial InjuriesAmygdalaFamous PersonsJudgmentAttentionFacial BonesOrientationEvoked Potentials, VisualFreeze FracturingFearPsychophysicsEvoked PotentialsImage Processing, Computer-AssistedEstheticsAnalysis of VarianceFaciesElectroencephalographyCues