title: Cognitive fluctuations associated with on-off phenomenon in Parkinson disease.
mesh_terms: D000328:Adult; D003071:Cognition / Q000502:physiology*; D006801:Humans; D007980:Levodopa / Q000009:adverse effects / Q000627:therapeutic use; D008297:Male; D010300:Parkinson Disease / Q000188:drug therapy / Q000503:physiopathology / Q000523:psychology*; D011581:Psychological Tests; D011954:Receptors, Dopamine / Q000502:physiology
chemical_list: D011954:Receptors, Dopamine; D007980:Levodopa