Substantia NigraDopamineParkinsonian DisordersParkinson DiseaseSubstantia GelatinosaTyrosine 3-MonooxygenaseCorpus StriatumMesencephalonDopaminergic NeuronsOxidopamineNeurons1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridineMPTP PoisoningParkinson Disease, SecondarySubstantia Innominataalpha-SynucleinBasal GangliaTegmentum MesencephaliGlobus PallidusRats, Sprague-DawleyLewy BodiesVentral Tegmental AreaNeostriatumNerve DegenerationBrainNeural PathwaysCaudate NucleusApomorphineReceptors, DopamineReceptors, Dopamine D2PutamenDopamine AgentsLevodopaAutoradiographyBehavior, AnimalSubthalamic Nucleus1-Methyl-4-phenylpyridiniumDopamine AgonistsDopamine Plasma Membrane Transport ProteinsMedial Forebrain BundleDopamine Antagonistsgamma-Aminobutyric Acid3,4-Dihydroxyphenylacetic AcidHydroxydopaminesDisease Models, AnimalSynucleinsMotor ActivityRed NucleusImmunohistochemistryExtrapyramidal TractsQuinpiroleHypokinesiaGlial Cell Line-Derived Neurotrophic FactorNeurotoxinsMagnetic Resonance ImagingAntiparkinson AgentsElectric StimulationNeuroprotective AgentsSympatholyticsBrain ChemistryThalamusReceptors, Dopamine D1Action PotentialsNerve Tissue ProteinsRats, WistarMice, Inbred C57BL2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepineSulpirideHomovanillic AcidReceptors, Dopamine D3HaloperidolStilbamidinesStereotaxic TechniquesMelaninsNomifensineMuscimolBenzazepinesSynaptic TransmissionBrain MappingCell CountBrain Tissue TransplantationRats, Inbred StrainsAmphetamineLocus CoeruleusAdrenergic AgentsMazindolMice, Neurologic MutantsAnalysis of VarianceMedial Collateral Ligament, KneeParaquatAphakiaGABA AntagonistsCalbindinsDiencephalonFetal Tissue TransplantationBicucullineMicrogliaMicroinjectionsElectrophysiologyNissl Bodies