SphenoidOnline version superior aspect by Michon Perre 1 Optic groove 2 Greater wing 3 optic canal 4 foramen ovale 5 foramen spinosum 6 carotid sulcus 7 Dorsum sellae 8 Sella turcica 9 Posterior clinoid process 10 Tuberculum sellae 11 Foramen rotundum 12 Anterior clinoid process 13 Lesser wing