Fig. 6.

(A) After the removal of the insula and of the claustro-opercular fibres, the dissection study demonstrated the parallel course of the IFOF (pink arrow) and OR (blue arrow) from the occipital lobe to the TS, up to the IFOF fan-shaped stem at the level of the ventral EC before it enters within the frontal lobe (pink circle). (B) The IFOF and OR run deeper in the posterior and middle SS with respect to the AF (blue arrow), and lateral along to the occipital horn, the trigone and the temporal horn (pink arrow). (C) The inferior component of the OR envelops the floor of the occipital horn, the trigone and temporal horn (blue circle). AF, arcuate fasciculus; EC, external capsule; IFOF, inferior fronto-occipital fascicle; OR, optic radiation; SS, stratum sagittalis; TS, temporal stem.