ALT Associations between blast exposure and neuroimaging measures. Cumulative blast exposure was associated with alterations in measures of cortical thickness (Left), resting-state measures of functional connectivity (Middle), and measures of translocator protein (Right). For each modality, the anatomic regions that showed a significant association with blast exposure level in the adjusted regression models (controlling for age, combat exposure, and blows to the head) are superimposed on the surface of the brain. Orange colors indicate a positive association with blast exposure, whereas blue colors represent a negative association with blast exposure.