RewardChoice BehaviorMotivationConditioning, OperantAnticipation, PsychologicalNucleus AccumbensCuesBehavior, AnimalReinforcement (Psychology)Self StimulationPunishmentDopamineImpulsive BehaviorDecision MakingLearningReaction TimeProbability LearningMagnetic Resonance ImagingBrain MappingBasal GangliaPrefrontal CortexBrainRats, Long-EvansConditioning (Psychology)Ventral Tegmental AreaFeedback, PsychologicalConditioning, ClassicalPsychomotor PerformanceCocaineBehavior, AddictiveReinforcement ScheduleDriveAssociation LearningGamblingFood PreferencesCorpus StriatumEconomics, BehavioralNeuronsAnalysis of VarianceGames, ExperimentalAnhedoniaAppetitive BehaviorLimbic SystemFeeding BehaviorPhotic StimulationDopamine Uptake InhibitorsSelf AdministrationNeural PathwaysGyrus CinguliMacaca mulattaPleasureSucroseCaudate NucleusSubstance Withdrawal SyndromeAmygdalaDiscrimination LearningImage Processing, Computer-AssistedTime FactorsGoalsMesencephalonModels, PsychologicalFrontal LobeFoodFlupenthixolPlant NectarTask Performance and AnalysisFunctional NeuroimagingDopamine AntagonistsBehaviorDiscrimination (Psychology)Cocaine-Related DisordersNicotineNeostriatumMotor ActivityDopaminergic NeuronsReceptors, Dopamine D2Extinction, PsychologicalUncertaintyRats, Sprague-DawleyNerve NetCompulsive BehaviorTasteReversal LearningSweetening AgentsMedial Forebrain BundleAmphetamineSaccharin