Nucleus AccumbensSelf AdministrationCocaineAnimal ShellsMicroinjectionsDopamine Uptake InhibitorsRewardConditioning, OperantDopamineRats, Sprague-DawleyDopamine AntagonistsBehavior, AnimalMuscimolAppetitive BehaviorDrug-Seeking BehaviorVentral Tegmental AreaMicrodialysisReceptors, Dopamine D1BenzazepinesRats, Long-EvansAmphetamineReinforcement (Psychology)Extinction, PsychologicalEgg ShellBehavior, AddictiveReceptors, Dopamine D2Dopamine AgonistsCocaine-Related DisordersFeeding BehaviorOncogene Proteins v-fosReinforcement ScheduleGABA AgonistsHypothalamic Area, LateralHeroinGABA-A Receptor AgonistsMotor ActivityFlupenthixolSweetening AgentsCorpus StriatumFood PreferencesPair BondConditioning (Psychology)Proto-Oncogene Proteins c-fosDose-Response Relationship, DrugNeural PathwaysHeroin DependenceReceptors, Opioid, muSubstance Withdrawal SyndromeAnalysis of VarianceCentral Nervous System StimulantsSucroseCuesHaloperidolSelf StimulationReceptor, Serotonin, 5-HT1BEnkephalin, Ala(2)-MePhe(4)-Gly(5)-RacloprideNicotineDrug Administration RoutesEatingAmygdalaPrefrontal CortexFood DeprivationEthanolReceptors, AMPAMotivationRats, WistarMorphineNicotinic AgonistsNaltrexoneDynorphinsConditioning, ClassicalLimbic SystemExcitatory Amino Acid AntagonistsTasteReceptors, Opioid, kappaNeuronsAvoidance LearningDeep Brain StimulationReceptors, Dopamine3,4-Dihydroxyphenylacetic AcidBrainSeptal NucleiDrug InteractionsQuinpiroleCaudate NucleusNeostriatumElectric StimulationTime FactorsReceptors, Dopamine D32,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepineNarcoticsSulpirideDopamine Plasma Membrane Transport ProteinsStereotyped BehaviorHomovanillic AcidSalicylamidesGlutamic AcidAnomuraSnails