Fig. 4.

Pathway selection. (A) All pathways in the right and left hemisphere are estimated; only those pathways that pass through the corpus callosum are analyzed. (B) The callosal pathways are segmented based on their intersection with one of seven possible planar regions, shown as the colored planes. (C) The segmentation of all the callosal pathways is shown by using the same color scheme as the planar segmentation regions. These are occipital (green), posterior parietal (yellow), superior parietal (blue), temporal (purple), superior frontal (red), anterior frontal (orange), orbitofrontal (cyan). (D) The outline of the callosum is color coded by the projection zone of the fibers within each segment. The black point below each corpus callosum indicates the location of the AC. The mean (SD) cross-sectional segment areas are as follows (in mm²): occipital, 39.9 (10.8); temporal, 29.2 (14.4); posterior parietal, 30.7 (14.7); superior parietal, 33.5 (15); superior frontal, 103.8 (23.4); anterior frontal, 96.4 (20.8); orbital, 20.6 (8.5). All brains are AC–PC aligned, but otherwise left in native space. (Scale bar: 1 cm.)