User:Talkingneanderthal/ACF sandbox
From Wikipedia, the free encyclopedia
The anterior cranial fossa is a depression in the floor of the cranial base which houses the projecting frontal lobes of the brain. It is formed by the horizontally-oriented orbital plates of the frontal bone, the cribriform plate of the ethmoid bone, and the lesser wings (orbitosphenoids) and body of the sphenoid bone. This part of the sphenoid body can be referred to as the jugum sphenoidale, planum sphenoidale, or presphenoid bone, depending on context. The anterior margin of the chiasmatic groove is situated directly posterior to the jugum sphenoidale and runs on either side to the upper margin of the optic foramen. The posterior margin of the anterior cranial fossa is at the junction between the lesser wings and anterior margin of the chiasmatic groove laterally and the tuberculum sellae along the midline and just to either side. The anterior cranial fossa is positioned anterior to the middle cranial fossa, and the posterior, middle, and anterior cranial fossae are arranged like a staircase when viewed from the side, with the anterior cranial fossa occupying the "highest" position closest to the vertex of the crania.
Anterior cranial fossa | |
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Details | |
Identifiers | |
Latin | fossa cranii anterior |
Anatomical terminology |