ADHD a 'disorder', not bad behavior

People with ADHD have slightly smaller brains than those without the condition, according to a study released on Thursday which insisted it is a physical disorder and not just bad behavior.

The largest analysis to date of the brains of people with attention deficit hyperactivity disorder found "structural differences" and evidence of delayed development compared with non-sufferers, researchers reported.

"The results from our study confirm that people with ADHD have differences in their brain structure and therefore suggest that ADHD is a disorder of the brain," said the study's lead author, Martine Hoogman of Radboud University Medical Centre in the Netherlands.