Corpus StriatumNeostriatumDopamineNucleus AccumbensReceptors, Dopamine D2Basal GangliaRewardPutamenCaudate NucleusDopamine Uptake InhibitorsRacloprideCocaineDopamine AntagonistsBehavior, AnimalMicrodialysisNomifensineRats, Long-EvansRats, Sprague-DawleyConditioning, OperantMedial Forebrain BundleDopamine Plasma Membrane Transport ProteinsAmphetamineReceptors, Dopamine D1Self AdministrationDopamine AgentsNeuronsCocaine-Related DisordersCuesMagnetic Resonance ImagingNeural PathwaysSubstantia NigraPrefrontal CortexBrainMethamphetamineBehavior, AddictiveTyrosine 3-MonooxygenaseAnalysis of VarianceQuinpirolealpha-MethyltyrosineDopamine AgonistsGenetic DeterminismDopaminergic NeuronsBrain MappingDopamine and cAMP-Regulated Phosphoprotein 32Receptors, Dopamine D3Motor ActivityReaction TimeLimbic SystemChoice BehaviorImage Processing, Computer-AssistedThiomalatesLearningProto-Oncogene Proteins c-fosDrug-Seeking BehaviorReinforcement (Psychology)Central Nervous System StimulantsGames, ExperimentalExtinction, PsychologicalBenzazepinesElectrochemical TechniquesMaze LearningEnkephalinsLevodopaPsychomotor PerformanceCerebral CortexMice, Inbred C57BLMedial Collateral Ligament, KneeExcitatory Amino Acid AntagonistsOxidopamineBrain ChemistrySynaptic TransmissionTime FactorsExtracellular SpaceGlutamic AcidElectric StimulationNerve Tissue ProteinsRats, WistarHippocampusReinforcement ScheduleMotivationNeuronal PlasticityPresynaptic Terminals3,4-Dihydroxyphenylacetic AcidDose-Response Relationship, DrugReceptors, Opioid, kappaElectrochemistryConditioning, ClassicalNeurotransmitter AgentsReceptors, N-Methyl-D-AspartatePhotic StimulationImmunohistochemistryEthanolVentral Tegmental AreaDisease Models, AnimalOxygenNicotinePositron-Emission TomographySubstance Withdrawal SyndromeMice, KnockoutReceptors, Dopamine