MorphineMusicMorphine DependenceMorphine DerivativesAnalgesics, OpioidPitch PerceptionDrug ToleranceNarcoticsVapor PressurePitch DiscriminationAuditory PerceptionNaloxoneVolatilizationAptitudeCreativityReceptors, Opioid, muNarcotic AntagonistsAuditory Perceptual DisordersAcoustic StimulationAnalgesiaInjections, SpinalPain MeasurementSubstance Withdrawal SyndromeCodeinePain, PostoperativeAnalgesicsPainReceptors, OpioidNaltrexoneDose-Response Relationship, DrugAnalgesia, Patient-ControlledNalorphineSoundAuditory CortexEvoked Potentials, AuditoryHeroinRats, Sprague-DawleyHydromorphoneSteamFentanylEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Periaqueductal GrayGanglioside GalactosyltransferaseAcousticsGasesOxycodoneDancingPentazocineMorphinansPattern Recognition, PhysiologicalEnkephalinsTime PerceptionNalbuphineReceptors, Opioid, deltaMercuryMeperidineTime FactorsThebaineLiteratureBehavior, AnimalLanguage ArtsPain ThresholdHallucinationsOxymorphoneHearingEvoked Potentials, Auditory, Brain StemAnalgesia, EpiduralBrainReaction TimeSound SpectrographyContingent Negative VariationAgnosiaOpiumAnalysis of VarianceAuditory Diseases, CentralCochlear ImplantsMagnetoencephalographySpeech PerceptionEndorphinsHumidityLanguageLoudness PerceptionMethadoneReceptors, Opioid, kappaBrain StemInjections, SubcutaneousSpinal CordDrug InteractionsImaginationInjections, IntraventricularMercury PoisoningPapaverDouble-Blind MethodLevallorphanSingingLocus CoeruleusFunctional LateralitySpeechHyperalgesiaPhysics