Hot TemperaturePain ThresholdThermoreceptorsThermosensingNociceptorsPhysical StimulationHyperalgesiaPainPain MeasurementSpinothalamic TractsCold TemperatureSkin TemperatureNociceptionSensationMorphineReaction TimeCapsaicinNeurons, AfferentNeuralgiaAnalgesicsPain PerceptionTRPV Cation ChannelsBehavior, AnimalSpinal CordNaloxoneRats, Sprague-DawleyPosterior Horn CellsAnalgesiaAnalgesics, OpioidSensory Receptor CellsNeural ConductionAfferent PathwaysPsychophysicsPhotic StimulationNerve Fibers, UnmyelinatedElectroacupunctureAction PotentialsSkinInjections, SpinalBody Temperature RegulationNeuronsFreund's AdjuvantBrain MappingNerve FibersCarrageenanReceptors, Opioid, muGanglia, SpinalTime FactorsElectric StimulationTemperatureElectrophysiologyAnalysis of VarianceGeneralization, StimulusAcoustic StimulationDose-Response Relationship, DrugDisease Models, AnimalMagnetic Resonance ImagingRats, WistarBrainVisual PerceptionDiscrimination LearningDiscrimination (Psychology)InflammationPattern Recognition, VisualAttentionSensory ThresholdsMotion PerceptionCuesAuditory PerceptionVisual CortexContrast SensitivityOrientationEvoked Potentials, VisualColor PerceptionModels, NeurologicalTouchConditioning, ClassicalEvoked PotentialsEvoked Potentials, AuditorySpace PerceptionVisual PathwaysConditioning (Psychology)ColumbidaeForm PerceptionCatsPsychomotor PerformanceConditioning, OperantVisual FieldsReinforcement (Psychology)Macaca mulattaAuditory CortexElectroencephalographyFunctional LateralityPerceptual MaskingTasteSignal Detection, PsychologicalTime PerceptionGeneralization (Psychology)Optical IllusionsAdaptation, Physiological