Parkinsonian DisordersInorganic ChemicalsSupranuclear Palsy, ProgressiveMultiple System AtrophyParkinson DiseaseLevodopaParkinson Disease, SecondaryAntiparkinson Agents1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridineGlobus PallidusHypokinesiaMuscle RigidityBrain ChemistrySubthalamic NucleusDyskinesia, Drug-InducedBipolar DisorderBrain InjuriesOxidopamineSubstantia NigraBrainBrain NeoplasmsTremorCorpus StriatumDeep Brain StimulationBrain MappingExtrapyramidal TractsDyskinesiasMental DisordersDopamineCarbidopaBasal GangliaAnxiety DisordersMood DisordersDopamine AgentsMovement DisordersOlivopontocerebellar AtrophiesNeuronsBenserazideMagnetic Resonance ImagingMazindolDiagnostic and Statistical Manual of Mental Disorders