Brain scans of children with attention deficit hyperactivity disorder show abnormalities in the fiber pathways along which brain signals pass, scientists said on Monday. The finding indicates the disorder may be more than just a chemical imbalance, they added. Using an imaging technique called diffusion tensor imaging, researchers found subtle anatomical differences in children diagnosed with ADHD that may affect communication between key areas of the brain -- the frontal cortex, basal ganglia, brain stem and cerebellum.
