(IMAGE) McGill University Caption Yellow/orange areas are regions where the thickness of the cortex at age 73 is associated with the amount of lifetime smoking; the greater the amount of lifetime smoking, the thinner the cortex. Credit Credit: <i>Molecular Psychiatry</i>, S Karama, IJ Deary et al. Usage Restrictions In association with this study only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.