Anatomy and White Matter Connections of the Inferior Temporal Gyrus

The 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....

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Bibliographic Details
Published in:World neurosurgery 2020-11, Vol.143, p.e656-e666
Main Authors: Lin, Yueh-Hsin, Young, Isabella M., Conner, Andrew K., Glenn, Chad A., Chakraborty, Arpan R., Nix, Cameron E., Bai, Michael Y., Dhanaraj, Vukshitha, Fonseka, R. Dineth, Hormovas, Jorge, Tanglay, Onur, Briggs, Robert G., Sughrue, Michael E.
Format: Article
Language:English
Subjects:
Adult
Anatomy
Connectome - methods
Diffusion Magnetic Resonance Imaging - methods
DSI
Female
Humans
Inferior temporal gyrus
Male
Nerve Net - anatomy & histology
Nerve Net - diagnostic imaging
Temporal Lobe - anatomy & histology
Temporal Lobe - diagnostic imaging
Tractography
White matter
White Matter - anatomy & histology
White Matter - diagnostic imaging
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Summary:The 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. Diffusion 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. We 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. This 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.
ISSN:1878-8750
1878-8769
DOI:10.1016/j.wneu.2020.08.058