Nucleus AccumbensCocaineDopamineSeptal NucleiDopamine Uptake InhibitorsRats, Sprague-DawleyAmphetamineReceptors, Dopamine D2MicrodialysisDopamine AntagonistsReceptors, DopamineSubstance Withdrawal SyndromeReceptors, Dopamine D1QuinpiroleDopamine AgonistsEthylaminesBehavior, AnimalReceptors, Dopamine D3SalicylamidesReceptor, Serotonin, 5-HT2CBenzazepinesNeuronsCell NucleusSolitary NucleusCorpus StriatumMotor ActivityCentral Nervous System StimulantsRewardSelf AdministrationRats, WistarConditioning, OperantDose-Response Relationship, DrugMicroinjectionsAnalysis of VarianceElectrochemistryDendritesLimbic SystemVentral Tegmental AreaCaudate NucleusCocaine-Related DisordersElectric StimulationRats, Long-EvansTime Factors3,4-Dihydroxyphenylacetic AcidReinforcement (Psychology)Prefrontal CortexReceptors, Opioid, muNeural PathwaysFlupenthixolMorphineNeostriatumDrug-Seeking BehaviorHaloperidolProto-Oncogene Proteins c-fosSynaptic TransmissionReceptors, AMPAGlutamic AcidOncogene Proteins v-fosCuesAppetitive BehaviorExtinction, PsychologicalHeroinConditioning (Psychology)BrainBehavior, AddictiveReceptors, N-Methyl-D-AspartateAmygdalaMuscimolSulpiride2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepinePutamenDopamine Plasma Membrane Transport ProteinsNarcoticsHomovanillic AcidRaphe NucleiEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Stereotyped BehaviorReinforcement ScheduleThalamic NucleiHypothalamic Area, LateralPair BondSubstantia InnominataEthanolTegmentum MesencephaliExcitatory Amino Acid AntagonistsGlobus PallidusFood PreferencesDrug InteractionsExtracellular SpaceGABA AgonistsPresynaptic TerminalsEnkephalinsSucroseMotivationCentral Nervous System DepressantsNomifensineFeeding BehaviorMethamphetamineDopamine AgentsBrain Chemistry