Neuronal PlasticityNucleus AccumbensCocaineSynapsesGlutamic AcidExcitatory Postsynaptic PotentialsSynaptic TransmissionReceptors, AMPADopamine Uptake InhibitorsNeuronsRats, Sprague-DawleyReceptors, N-Methyl-D-AspartateCocaine-Related DisordersDopamineLong-Term PotentiationHippocampusSelf AdministrationExcitatory Amino Acid AntagonistsPresynaptic TerminalsBehavior, AnimalReceptors, GlutamateElectric StimulationConditioning, OperantRewardCell NucleusPatch-Clamp Techniquesgamma-Aminobutyric AcidMicrodialysisDopamine AntagonistsReceptors, Metabotropic GlutamateRats, WistarRats, Long-EvansNeural PathwaysCorpus StriatumVentral Tegmental AreaLong-Term Synaptic DepressionAmphetamineSeptal NucleiMicroinjectionsMotor ActivityReceptors, Dopamine D2Synaptic VesiclesAnimals, NewbornNeostriatumNerve Tissue ProteinsLimbic SystemReinforcement (Psychology)Dendritic SpinesReceptors, Dopamine D1Analysis of VarianceDopamine AgonistsMice, Inbred C57BLPrefrontal CortexCaudate NucleusElectrophysiologyAmygdalaDrug-Seeking BehaviorSubstance Withdrawal SyndromeNeural InhibitionDose-Response Relationship, DrugReceptors, DopamineVesicular Glutamate Transport Protein 2BenzazepinesBehavior, AddictiveExtinction, PsychologicalSynaptic PotentialsTime FactorsCrack CocaineBrainMossy Fibers, HippocampalConditioning (Psychology)Action PotentialsInterneurons2-Amino-5-phosphonovalerate3,4-Dihydroxyphenylacetic AcidQuinpirolePyramidal CellsHeroinCuesReinforcement ScheduleDopamine Plasma Membrane Transport ProteinsGABA AntagonistsDendritesProto-Oncogene Proteins c-fosNarcoticsLearningFlupenthixolReceptor, Cannabinoid, CB1Neurotransmitter AgentsHaloperidolCentral Nervous System StimulantsReceptors, Dopamine D3Cells, CulturedExcitatory Amino Acid AgonistsMuscimolVesicular Glutamate Transport Protein 1Cerebral CortexAppetitive BehaviorOncogene Proteins v-fosNerve Net