“…Our finding of significant correlations between the CCA and its segments (C1, C2, C3) in both sexes suggests to adequate subdivision of the CC in polar coordinate system we used. Our previous finding of insignificantly larger CCA in females on autopsy material [25] can be related to better discrimination of tissues on dissection, and to the different involvement of the medial longitudinal striae, more variable than the lateral ones, with individual features which make the supracallosal pattern variable [22]. A-A' -length of hemisphere along the polar coordinate (in mm); CCA -surface area of total midsagittal section of the corpus callosum and of its segments (C1 -anterior segment, C2 -middle, C3 -posterior segment); TCC -thickness of the thinnest part of the CC; a angle -angular coordinate of the dorsal point (d) of thinnest part of the CC in polar coordinate system; M -males; F -females However, the average CCA was significantly larger in females after controlling for brain size and age, especially in the young adults [2], as well as the adjusted size of the CC for forebrain volume, without effect of handedness [26].…”