Antisocial behaviour hormone link

Low levels of the stress hormone cortisol have been linked to antisocial behaviour in adolescent boys.

Cortisol levels in the body usually surge in stressful situations, thought to help people regulate emotions.

But a Cambridge university study found this did not happen in boys with a history of severe antisocial behaviour.

The Biological Pyschiatry study suggests some bad behaviour may be a form of mental illness linked to a chemical imbalance in the brain. - bbc