Adolescents with a higher risk for developing psychosis have subtle differences in brain structure, including lower cortical thickness than their peers without risk factors. In those who developed psychosis, the cortical thinning was most pronounced in several areas of the temporal and frontal regions of the brain.
A higher BMI and bigger waist during your sixties have been linked to an increase in cortical thinning. Having a thinner cortex has previously been associated with an increased Alzheimer's risk.