title: Zeroing in on attention deficit disorder.
mesh_terms: D001289:Attention Deficit Disorder with Hyperactivity / Q000188:drug therapy* / Q000503:physiopathology / Q000523:psychology; D001921:Brain / Q000098:blood supply*; D000697:Central Nervous System Stimulants / Q000627:therapeutic use*; D002648:Child; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008774:Methylphenidate / Q000627:therapeutic use*