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Physical differences in ADHD brains

Also from the Radiological Society of North America's annual meeting, by way of PRNewsWire:

Novel Imaging Method Shows Abnormal Brain Anatomy in Children with ADHD (embargoed until 9 a.m. CT, Nov. 29)

Researchers at North Shore-Long Island Jewish Health System in New York have discovered that children with h Attention Deficit Hyperactivity Disorder (ADHD) have abnormalities in the anatomy of their brains. Previously, ADHD was suspected to be a chemical imbalance, but this study shows physical abnormalities in the fiber pathways in three areas of the brain that regulate attention, impulsive behavior, motor activity and inhibition. A second study found that stimulant medications usually prescribed for ADHD actually correct some of these structural abnormalities. The studies will be presented by Manzar Ashtari, Ph.D.

More technical summaries are here and here.