An opening in the skull through which cranial nerve II passes.[MP]. [ MP:0010704 ]

Synonyms: optic nerve foramen optic foramen optic canal optic nerve (II) foramen

This is just here as a test because I lose it

Term information


pheno_slim, vertebrate_core


In teleost fishes the opening is wider that in mammals. Due to the longer and deeper shape in mammals, this is usually called the optic canal; sometimes the term optic foramen may be used for the opening of the canal, but here we use this term to denote the entire space together with surrounding bone surface.

depicted by


external definition

An aperture in the root of the lesser wing of the sphenoid bone transmitting the optic nerve. [TFD][VHOG]

The short canal through the orbitosphenoid bone at the apex of the orbit that gives passage to the optic nerve and the opthalmic artery

Foramen in the orbital region of the neurocranium for the passage of the optic nerve (cranial nerve II).[TAO]

has alternative id


has related synonym

canalis opticus

foramen opticum ossis sphenoidalis