• Yueh-Hsin Lin, Isabella M Young, Andrew K Conner, Chad A Glenn, Arpan R Chakraborty, Cameron E Nix, Michael Y Bai, Vukshitha Dhanaraj, R Dineth Fonseka, Jorge Hormovas, Onur Tanglay, Robert G Briggs, and Michael E Sughrue.
• Centre for Minimally Invasive Neurosurgery Prince of Wales Private Hospital, Sydney, Australia.
• World Neurosurg. 2020 Nov 1; 143: e656-e666.

BackgroundThe inferior temporal gyrus (ITG) is known to be involved in high-cognitive functions, including visual and language comprehensions and emotion regulation. A detailed understanding of the nature of association fibers could significantly improve postoperative morbidity related to declining capacity. Through diffusion spectrum imaging-based fiber tracking, we have characterized these connections on the basis of their relationships to other cortical areas.MethodsDiffusion spectrum images from 10 healthy adults of the Human Connectome Project were randomly selected and used for tractography analysis. We evaluated the ITG as a whole based on connectivity with other regions. All ITG tracts were mapped in both hemispheres, and a lateralization index was calculated with resultant tract volumes.ResultsWe identified 5 major connections of the ITG: U-fiber, inferior longitudinal fasciculus, vertical occipital fasciculus, arcuate fasciculus, and uncinate fasciculus. There was no fiber lateralization detected.ConclusionsThis study highlights the principal white-matter pathways of the ITG and demonstrates key underlying connections. We present a summary of the relevant clinical anatomy for this region of the cerebrum as part of a larger effort to understand it in its entirety.Copyright © 2020. Published by Elsevier Inc.

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