Re-experiencing (DSM-IV cluster B) symptoms of PTSD are inversely correlated with (a) right sgACC and (b) right anterior hippocampus gray matter volume. Scatterplots on the right show extracted cluster data in relation to re-experiencing symptom severity determined by the UCLA PTSD Reaction Index. Results include sex, age, and cluster C and D symptoms as covariates. PTSD, post-traumatic stress disorder; sgACC, subgenual anterior cingulate cortex; vmPFC, ventromedial prefrontal cortex. n=27.