title: Periodicity of speech in Parkinsonism.
mesh_terms: D000328:Adult; D000368:Aged; D001479:Basal Ganglia / Q000473:pathology; D004295:Dihydroxyphenylalanine / Q000627:therapeutic use; D005246:Feedback; D006801:Humans; D007699:Kinesthesis; D008875:Middle Aged; D010300:Parkinson Disease / Q000150:complications* / Q000188:drug therapy; D010301:Parkinson Disease, Postencephalitic; D010507:Periodicity; D013064:Speech Disorders / Q000150:complications*; D013237:Stereoisomerism
chemical_list: D004295:Dihydroxyphenylalanine