The stimulant methylphenidate (MPH) and the nonstimulant atomoxetine (ATX) are the most commonly-prescribed pharmacological treatments for attention deficit/hyperactivity disorder (ADHD). However, the drugspecifc mechanism of action on brain function in ADHD patients is not well known. | Diferential therapeutic efects of atomoxetine and methylphenidate in childhood attention defcit/hyperactivity disorder as measured by near-infrared spectroscopy