The point where the upper temporal line cuts the coronal suture is named the stephanion.
The stephanion is found anterior to the euryon (the most lateral point of the skull), and hence, the supramarginal gyrus.
The stephanion is located on the same coronal plane as Broca's area (Brodmann's area 44–45).
[1] This article incorporates text in the public domain from page 183 of the 20th edition of Gray's Anatomy (1918)
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