The cortical endpoints of the IFOF and its five subcomponents (subject 1, left hemisphere). (A) A diagram of the five subcomponents. (B) IFOF-I originated from the frontal pole cortex to the inferior occipital lobe, the occipital pole, the middle occipital lobe, the superior occipital lobe, and the superior parietal lobe. (C) IFOF-II originated from the orbito-frontal cortex to the occipital pole, the inferior occipital gyrus, the pericalcarine, the middle occipital lobe, the superior occipital lobe and the fusiform gyrus, and the superior parietal lobe. (D) IFOF-III originated from the inferior frontal gyrus (i.e., pars opercularis, pars triangularis, and pars orbitalis) to the inferior occipital gyrus, the middle occipital lobe, the occipital pole, the superior occipital lobe, the angular gyrus, the superior parietal lobe, and the postcentral gygus. (E) IFOF-IV originated from the middle frontal gyrus to the occipital pole, the inferior occipital gyrus, the middle occipital lobe, the superior occipital lobe, the angular gyrus, the superior parietal lobe, and the postcentral gygus. (F) IFOF-V originated from the superior frontal gyrus to the occipital pole, the inferior occipital gyrus, the middle occipital lobe, the superior occipital lobe, the superior parietal lobe, the angular gyrus, and the postcentral gygus. FP, frontal pole; OFC, orbito-frontal cortex; Pop, pars opercularis; Ptr, pars triangularis; Por, pars orbitalis; MFG, middle frontal gyrus; SFG, superior frontal gyrus; AG, angular gyrus; SPL, superior parietal lobule; PG, postcentral gygus; SOL, superior occipital lobe; MOL, middle occipital lobe; IOL, inferior occipital lobe; FG, fusiform gyrus; Opo, occipital pole.