Meta-analysis of fMRI studies of timing in attention-deficit hyperactivity disorder (ADHD)

► Timing functions are impaired in attention-deficit hyperactivity disorder (ADHD). ► A meta-analysis was conducted of functional imaging studies of timing in ADHD. ► ADHD patients show consistent inferior frontal, cerebellar and parietal dysfunction. ► Long-term stimulant medication was associated with normal frontal activation.