EMOTIONAL stress caused by last year’s tsunami resulted in part of some survivors’ brains shrinking, according to scientists in Japan who grasped a unique chance to study the neurological effects of trauma.

On a quest to better understand post-traumatic stress disorder, the researchers compared brain scans they had taken of 42 healthy adolescents in other studies in the two years before the killer wave with new images taken three to four months thereafter.Among those with PTSD symptoms, they found a shrinking in the orbitofrontal cortex, a part of the brain involved in decision-making and the regulation of emotion, said a study published yesterday in Molecular Psychiatry.

via Brains melting down after Japan tsunami | The Australian.