Incoherence of neuroimaging studies of attention deficit/hyperactivity disorder

Neuroimaging studies have been conducted with increasing frequency in recen t years in attempts to identify structural and functional abnormalities in the brains of persons with attention deficit/hyperactivity disorder. Althou gh the results of these studies are frequently cited in support of a biolog ic etiology for this disorder, inconsistencies among studies raise question s about the reliability of the findings. The present review shows that no s pecific abnormality in brain structure or function has been convincingly de monstrated by neuroimaging studies. Implications regarding stimulant treatm ent for attention deficit/hyperactivity disorder are discussed.