London - Scientists have discovered brain abnormalities that could explain why some people are more prone to drug addiction.
Cocaine, one of the most addictive illegal drugs, exerts its effects on the brain by creating an overwhelming need to take more .
Researchers at the University of Cambridge found that parts of the brain reward system - where cocaine exerts its actions - were significantly enlarged in cocaine users, but they believe this abnormality is present in these individuals before their drug abuse starts and may make them more vulnerable to its effects.
Dr Karen Ersche, who led the study, said: “People describe their out-of-control drug use as a ‘compulsion’. Our work has laid the foundation for an understanding of cocaine dependence and why this compulsion occurs.” - Daily Mail