Children with Attention Deficit Hyperactivity Disorder - ADHD - have underactive parts of the brain which deal with decision-making, thinking and planning. The abnormality was revealed by a magnetic scanning device which enabled researchers to look at the brains of children without harming them from radioactivity. Eric Taylor, Professor of Child Psychiatry at the Medical Research Council, said this scanning technique had strenghtened claims that the controversial disease has a biological cause.
ADHD children find it difficult to concentrate for even short periods. They tend to act on impulse, and often have no sense of danger. Professor Taylor told "one of their problems is that they find it very hard to stop doing things.They can't wait, they can't delay... you see how the frontal lobes of the brain, the parts involved in decision making and thinking and planning, how they are active and working hard when the decision comes not to respond.
