Parkinsonian DisordersSpeech DisordersInorganic ChemicalsSupranuclear Palsy, ProgressiveSpeechMultiple System AtrophySpeech Production MeasurementDysarthriaSpeech PerceptionSpeech TherapyParkinson DiseaseSpeech IntelligibilityApraxiasStutteringSpeech Articulation TestsPhoneticsEnzyme TherapyArticulation DisordersVelopharyngeal InsufficiencySpeech AcousticsSpeech Discrimination TestsLanguage Development DisordersGalactosemiasVoice DisordersAudiometry, SpeechLevodopaParkinson Disease, SecondaryBipolar DisorderAntiparkinson AgentsMental DisordersAnxiety DisordersMood Disorders1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridineGlobus PallidusHypokinesiaMuscle RigiditySpeech Recognition SoftwareBrainBrain MappingBrain ChemistrySubthalamic NucleusDiagnostic and Statistical Manual of Mental DisordersSpeech Reception Threshold TestDyskinesia, Drug-InducedBrain InjuriesAcoustic StimulationMagnetic Resonance ImagingSound SpectrographyMovement DisordersSubstantia NigraOxidopamineBrain NeoplasmsDeep Brain StimulationCochlear ImplantsDepressive Disorder, MajorNoiseTremorCorpus StriatumDyskinesiasAttention Deficit Disorder with HyperactivityExtrapyramidal TractsBasal GangliaAutistic DisorderDopamineDepressive DisorderSpeech, EsophagealCarbidopaNeuronsDopamine AgentsObsessive-Compulsive DisorderChild Development Disorders, PervasiveStress Disorders, Post-TraumaticVoicePhobic DisordersSpeech, AlaryngealOlivopontocerebellar AtrophiesLanguageCognition DisordersPsychotic DisordersSubstance-Related DisordersAnalysis of VarianceDisease Models, AnimalVoice QualityPerceptual MaskingBenserazideTime FactorsCommunication Aids for DisabledMazindolLanguage DisordersLinguisticsFunctional LateralityNeural PathwaysAuditory PerceptionNeuropsychological TestsCochlear ImplantationAuditory ThresholdCerebral CortexPutamen