=====Sphenoidal emissary foramen=====
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In the base of the skull, in the great wings of the sphenoid bone, medial to the [[foramen ovale]], a small aperture, the [[sphenoidal emissary foramen]], may occasionally be seen (it is often absent) opposite the root of the [[pterygoid process]]. When present, it opens below near the scaphoid fossa. Vesalius was the first to describe and illustrate this foramen, and it thus sometimes bears the name of [[foramen Vesalii]] (meaning foramen of Vesalius). Other names include foramen venosum and canaliculus sphenoidalis.