Ventral Tegmental AreaTegmentum MesencephaliDopamineNucleus AccumbensMesencephalonCocaineRewardNeuronsSubstantia NigraRats, Sprague-DawleyPonsTyrosine 3-MonooxygenaseMicroinjectionsSelf AdministrationNeural PathwaysHabenulaMamillary BodiesDopamine AntagonistsQuinpiroleDopamine Uptake InhibitorsConditioning, OperantLimbic SystemRats, Long-EvansDopamine AgonistsReceptors, Dopamine D2gamma-Aminobutyric AcidBehavior, AnimalEthanolMotor ActivityNicotineSelf StimulationCentral Nervous System DepressantsMicrodialysisMorphineGlutamic AcidAmphetamineReinforcement (Psychology)Receptors, Dopamine D1Receptors, DopamineGABA AgonistsVesicular Glutamate Transport Protein 2NarcoticsBaclofenHeroinStereotaxic TechniquesSeptal NucleiInhibitory Postsynaptic PotentialsAction PotentialsOncogene Proteins v-fosBenzazepinesPrefrontal CortexAnalysis of VarianceSubstance Withdrawal SyndromeStilbamidinesNeuronal Tract-TracersGABAergic Neurons2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepineElectric StimulationNeurotensinMuscimolSynaptic TransmissionCocaine-Related DisordersReceptors, Opioid, muAfferent PathwaysBrain StemNeural InhibitionDopamine AgentsProto-Oncogene Proteins c-fosNicotinic AgonistsNicotinic AntagonistsDose-Response Relationship, DrugExcitatory Amino Acid AntagonistsMecamylamineEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Rats, WistarConditioning (Psychology)Serotonin 5-HT3 Receptor AgonistsDrug-Seeking BehaviorHypothalamic Area, LateralReceptors, AMPABrainGABA-B Receptor AgonistsFlupenthixolCholinergic FibersElectrophysiologyLocus CoeruleusReceptor, Muscarinic M5Dopamine Plasma Membrane Transport ProteinsAppetitive BehaviorCentral Nervous System StimulantsTectum MesencephaliNeuroanatomical Tract-Tracing TechniquesBenzeneacetamidesCorpus StriatumGABA AntagonistsDrug Administration RoutesReceptors, NicotinicPatch-Clamp TechniquesReceptors, GABA-BSulpiride