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Sphenoid along with the brainstem and surrounding structures

The orientation box located in the top-left corner indicates the viewing direction (S superior, P posterior, L left) with arrows pointing toward superior, left, and anterior.

(Source: Nowinski WL, Thaung TS. A 3D stereotactic atlas of the adult human skull base. Brain Inform 2018;5[2]:1. Creative Commons Attribution 4.0 International [CC BY 4.0] license, creativecommons.org/licenses/by/4.0.)

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