Neural correlates of extraversion in males. (A) Whole brain VBM results revealing positive relationships between extraversion and GMV of Prc/POS, Th, lFFG/Cb, and rCb in males. (B) Correlations between extraversion and GMV in Prc/POS, Th, lFFG/Cb, and rCb separately for males and females, with positive correlations in males but no correlation in females. (C) Functional decoding of the regions Prc/POS, Th, lFFG/Cb, and rCb; behavioral domains at P < 0.05 uncorrected for multiple comparison.