Nucleus AccumbensCocaineDopamineCell NucleusDopamine Uptake InhibitorsRewardMicrodialysisRats, Sprague-DawleySelf AdministrationDopamine AntagonistsConditioning, OperantBehavior, AnimalAmphetamineMicroinjectionsSeptal NucleiLimbic SystemVentral Tegmental AreaReceptors, Dopamine D2Caudate NucleusCocaine-Related DisordersReceptors, Dopamine D1Motor ActivityRats, Long-EvansCorpus StriatumReceptors, Dopamine3,4-Dihydroxyphenylacetic AcidDopamine AgonistsBenzazepinesReinforcement (Psychology)Prefrontal CortexNeural PathwaysNeuronsQuinpiroleSubstance Withdrawal SyndromeCentral Nervous System StimulantsFlupenthixolNeostriatumDrug-Seeking BehaviorHaloperidolProto-Oncogene Proteins c-fosAnalysis of VarianceOncogene Proteins v-fosDose-Response Relationship, DrugCuesReceptors, Dopamine D3Appetitive BehaviorExtinction, PsychologicalHeroinConditioning (Psychology)BrainBehavior, AddictiveAmygdalaMuscimolSulpiride2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepinePutamenDopamine Plasma Membrane Transport ProteinsReceptors, Opioid, muNarcoticsHomovanillic AcidRaphe NucleiMorphineEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Stereotyped BehaviorRats, WistarReinforcement ScheduleGlutamic AcidThalamic NucleiHypothalamic Area, LateralPair BondSynaptic TransmissionEthanolTegmentum MesencephaliSalicylamidesExcitatory Amino Acid AntagonistsGlobus PallidusFood PreferencesExtracellular SpaceReceptors, AMPAGABA AgonistsEnkephalinsSucroseMotivationCentral Nervous System DepressantsNomifensineSolitary NucleusFeeding BehaviorMethamphetamineDopamine AgentsBrain ChemistryConditioning, ClassicalNicotineApomorphineTime FactorsRacloprideSweetening AgentsNarcotic AntagonistsMedial Forebrain BundleSelf StimulationElectric Stimulation