Nucleus AccumbensCell NucleusNeuronsLysophospholipaseCerebral CortexBrainRats, Sprague-DawleyDopamineCocaineNerve Tissue ProteinsHippocampusDopamine Uptake InhibitorsRewardMicrodialysisSelf AdministrationBehavior, AnimalDopamine AntagonistsConditioning, OperantCell CountImmunohistochemistryAmphetamineMicroinjectionsSeptal NucleiLimbic SystemCaudate NucleusReceptors, Dopamine D2Ventral Tegmental AreaMotor ActivityReceptors, Dopamine D1Cocaine-Related DisordersCorpus StriatumRats, Long-EvansReceptors, DopamineNeural PathwaysDopamine AgonistsPrefrontal Cortex3,4-Dihydroxyphenylacetic AcidBenzazepinesReinforcement (Psychology)Analysis of VarianceProto-Oncogene Proteins c-fosNeostriatumQuinpiroleCentral Nervous System StimulantsSubstance Withdrawal SyndromeDose-Response Relationship, DrugFlupenthixolHaloperidolDrug-Seeking BehaviorOncogene Proteins v-fosCuesNeuronal PlasticityGlutamic AcidRats, WistarAppetitive BehaviorReceptors, Dopamine D3Extinction, PsychologicalSynaptic TransmissionConditioning (Psychology)AmygdalaHeroinMuscimolPutamenBehavior, AddictiveDopamine Plasma Membrane Transport ProteinsReceptors, Opioid, mu2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepineSulpirideNarcoticsExcitatory Amino Acid AntagonistsMorphineHomovanillic AcidThalamic NucleiTime FactorsEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Raphe NucleiHypothalamic Area, LateralReinforcement ScheduleStereotyped BehaviorReceptors, AMPAEthanolBrain ChemistryGlobus PallidusElectric StimulationTegmentum MesencephaliPair BondExtracellular SpaceGABA AgonistsSalicylamidesReceptors, N-Methyl-D-AspartateSolitary NucleusFood PreferencesEnkephalinsCentral Nervous System DepressantsSucroseFeeding BehaviorMotivationNicotineDopamine AgentsMethamphetamine