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. 2020 Aug 10;10:13489. doi: 10.1038/s41598-020-70410-6

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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(A) Demonstrates a dissection of the IFOF. Notice its subcomponents from the cuneus (demarcated in blue), lingual gyrus (light blue), and the inferior occipital gyrus (orange). This is confirmed in tractography in (B). The lateral occipital sulcus was included in pink dots to localize the fibers in the inferior occipital gyrus. The calcarine sulcus was included in purple dots to localize the lingual gyrus. We can see that subcomponents of the IFOF from the lingual gyrus and inferior occipital gyrus meet in the fusiform gyrus (black star) and course through the fusiform gyrus to reach the temporal lobe and their final destination in the frontal lobe. (C,D) Demonstrate the full IFOF. C = cuneus, L = lingual gyrus, IOG = inferior occipital gyrus, LOS (lateral occipital sulcus) = pink dots, CS (collateral sulcus) = purple dots.