Ventral Tegmental AreaDrug OverdoseCocaineButyrylcholinesteraseTegmentum MesencephaliCocaine-Related DisordersDopamineNucleus AccumbensSelf AdministrationDopamine Uptake InhibitorsDopaminergic NeuronsRewardMesencephalonRats, Sprague-DawleySubstantia NigraTyrosine 3-MonooxygenaseNeuronsDopamine AntagonistsConditioning, OperantQuinpiroleMicroinjectionsDopamine AgonistsReceptors, Dopamine D2Rats, Long-EvansHeroinBehavior, AnimalNarcoticsNeural PathwaysLimbic SystemReinforcement (Psychology)Motor ActivityEthanolSelf StimulationCentral Nervous System DepressantsMicrodialysisSalicylamidesgamma-Aminobutyric AcidAmphetamineNicotineReceptors, DopamineMorphineReceptors, Dopamine D1Substance Withdrawal SyndromeGlutamic AcidGABA AgonistsVesicular Glutamate Transport Protein 2HabenulaSeptal NucleiBaclofenBenzazepinesDose-Response Relationship, DrugDrug-Seeking BehaviorPrefrontal CortexAnalysis of VarianceStereotaxic TechniquesHeroin Dependence2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepineDopamine Plasma Membrane Transport ProteinsReceptors, Opioid, muInhibitory Postsynaptic PotentialsAcetaminophenDopamine AgentsMamillary BodiesAction PotentialsBehavior, AddictiveCrack CocaineNeurotensinGABAergic NeuronsMuscimolSerotonin 5-HT3 Receptor AgonistsReceptors, AMPAStilbamidinesSynaptic TransmissionConditioning (Psychology)Rats, WistarNeuronal Tract-TracersNicotinic AgonistsEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Analgesics, OpioidDrug InteractionsMecamylamineHypothalamic Area, LateralNarcotic AntagonistsNicotinic AntagonistsElectric StimulationBrainGABA-B Receptor AgonistsExcitatory Amino Acid AntagonistsNeural InhibitionCorpus StriatumExtinction, PsychologicalNaloxoneDrug Administration RoutesBenzeneacetamidesSulpirideEthylaminesCentral Nervous System StimulantsFlupenthixolElectrophysiologyProto-Oncogene Proteins c-fos