Nucleus AccumbensDopamineReceptors, Dopamine D2Dopamine AntagonistsReceptors, Dopamine D1Dopamine AgonistsReceptors, DopamineCocaineDopamine Uptake InhibitorsReceptors, Dopamine D3Cell NucleusDopamine Plasma Membrane Transport ProteinsMicrodialysisRewardRats, Sprague-DawleyDopamine AgentsAmphetamineSelf AdministrationBehavior, AnimalCorpus StriatumConditioning, OperantVentral Tegmental AreaCaudate NucleusBenzazepinesMicroinjectionsLimbic SystemSeptal NucleiQuinpiroleMotor ActivityCocaine-Related DisordersHaloperidolNeostriatumRats, Long-EvansNeuronsPrefrontal CortexSulpirideFlupenthixolReinforcement (Psychology)Neural PathwaysHomovanillic AcidCentral Nervous System StimulantsReceptors, Dopamine D5RacloprideSalicylamides3,4-Dihydroxyphenylacetic AcidDose-Response Relationship, DrugAnalysis of VarianceApomorphineSubstance Withdrawal SyndromeBrainPutamenProto-Oncogene Proteins c-fosDrug-Seeking BehaviorDopamine beta-HydroxylaseAppetitive BehaviorCuesOncogene Proteins v-fosNomifensineStereotyped BehaviorDopamine and cAMP-Regulated Phosphoprotein 32Extinction, PsychologicalConditioning (Psychology)HeroinRats, WistarBehavior, AddictiveOxidopamineMethamphetamineSynaptic TransmissionGlutamic AcidAmygdalaTegmentum MesencephaliTyrosine 3-MonooxygenaseReceptors, Opioid, muMuscimolMorphineExtracellular SpaceNarcoticsReinforcement ScheduleBrain Chemistry2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepineEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Medial Forebrain BundleRaphe NucleiEthanolGlobus PallidusExcitatory Amino Acid AntagonistsBiogenic MonoaminesDopaminergic NeuronsClozapineHypothalamic Area, LateralTime FactorsDextroamphetamineMesencephalonNicotinePair BondBasal GangliaMotivationEnkephalinsElectric StimulationThalamic Nuclei