Fig 4. Illustration of the fiber tracking projected on a left brain hemisphere (lateral view). Arcuate fasciculus tracking is displayed in dark blue. Segmentation of the UF and IOF tracking by using the 3D region of interest_subinsular is displayed in light blue. The subinsular portions of the UF and IOF are displayed in green and purple, respectively. Their extrainsular portions of the UF and IOF are displayed in red and in yellow, respectively.