Ventral Tegmental AreaTegmentum MesencephaliDopamineNucleus AccumbensDopaminergic NeuronsGABA AgonistsCocaineMesencephalonRewardRats, Sprague-DawleyNeuronsSubstantia NigraTyrosine 3-Monooxygenasegamma-Aminobutyric AcidSelf AdministrationGABA AntagonistsMicroinjectionsQuinpiroleDopamine AntagonistsDopamine Uptake InhibitorsDopamine AgonistsNeural PathwaysReceptors, Dopamine D2Conditioning, OperantLimbic SystemRats, Long-EvansEthanolCentral Nervous System DepressantsBehavior, AnimalBaclofenGABA AgentsSelf StimulationMotor ActivitySalicylamidesNicotineMicrodialysisReceptors, Dopamine D1Glutamic AcidReceptors, GABA-AReceptors, DopamineAmphetamineVesicular Glutamate Transport Protein 2MorphineReinforcement (Psychology)HabenulaMuscimolInhibitory Postsynaptic PotentialsSeptal NucleiNarcoticsReceptors, GABA-BStereotaxic TechniquesHeroinBenzazepinesPrefrontal CortexSubstance Withdrawal SyndromeGABA-B Receptor Agonists2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepineGABAergic NeuronsNeural InhibitionAction PotentialsSynaptic TransmissionAnalysis of VarianceReceptors, Opioid, muMamillary BodiesDose-Response Relationship, DrugCocaine-Related DisordersDopamine AgentsStilbamidinesNeurotensinSerotonin 5-HT3 Receptor AgonistsElectric StimulationRats, WistarEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Receptors, AMPAExcitatory Amino Acid AntagonistsNeuronal Tract-TracersNicotinic AgonistsHypothalamic Area, LateralNicotinic AntagonistsPatch-Clamp TechniquesMecamylamineElectrophysiologyDrug-Seeking BehaviorGABA ModulatorsDopamine Plasma Membrane Transport ProteinsBrainCentral Nervous System StimulantsConditioning (Psychology)Glutamate DecarboxylaseSulpirideBenzeneacetamidesDrug Administration RoutesAfferent PathwaysDrug InteractionsPonsEthylaminesProto-Oncogene Proteins c-fosCorpus StriatumBicucullineNeuroanatomical Tract-Tracing Techniques