Figure 1: Midsagittal and axial views of the splenium. (a) Midsagittal T1-weighted MRI shows the corpus callosum (CC) and the splenium (in red). According to the conventional partitioning scheme, the splenium corresponds to the posterior 1/5 of the CC, which is separated by the border line perpendicular to the line linking the most anterior (ACC) and posterior (PCC) points of the CC. (b) Axial view of the splenium (1) from Gray’s Anatomy of the Human Body. The numbers refer to the posterior forceps (2), hippocampus (3), fornix (4), undersurface of the CC (5), and genu of internal capsule (6).