RewardChoice BehaviorMotivationConditioning, OperantAnticipation, PsychologicalNucleus AccumbensCuesBehavior, AnimalReinforcement (Psychology)Self StimulationPunishmentDopamineImpulsive BehaviorDecision MakingReaction TimeLearningProbability LearningBrain MappingMagnetic Resonance ImagingBasal GangliaPrefrontal CortexRats, Long-EvansConditioning (Psychology)Ventral Tegmental AreaFeedback, PsychologicalPsychomotor PerformanceConditioning, ClassicalBrainCocaineAssociation LearningReinforcement ScheduleDriveGamblingBehavior, AddictiveFood PreferencesAnalysis of VarianceCorpus StriatumGames, ExperimentalNeuronsAnhedoniaAppetitive BehaviorEconomics, BehavioralLimbic SystemPhotic StimulationFeeding BehaviorDopamine Uptake InhibitorsSelf AdministrationNeural PathwaysMacaca mulattaTime FactorsGyrus CinguliPleasureSucroseCaudate NucleusSubstance Withdrawal SyndromeAmygdalaDiscrimination LearningMesencephalonImage Processing, Computer-AssistedFrontal LobeGoalsModels, PsychologicalFlupenthixolFoodPlant NectarTask Performance and AnalysisFunctional NeuroimagingDopamine AntagonistsDiscrimination (Psychology)Cocaine-Related DisordersNicotineNeostriatumReceptors, Dopamine D2Dopaminergic NeuronsRats, Sprague-DawleyMotor ActivityExtinction, PsychologicalBehaviorSweetening AgentsCompulsive BehaviorReversal LearningAmphetamineMedial Forebrain BundleSaccharinTasteUncertainty