Cortical Thickness (IMAGE) McGill University Caption How cortical thickness associates with BMI. Body mass index relates positively with cortical thickness in blue areas, and negatively with cortical thickness in red areas. Credit Uku Vainik Usage Restrictions None 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.