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This article has been tagged since November 2007.
|Bone: Optic foramen|
| 1: Foramen ethmoidale|
2: Canalis opticus
3: Fissura orbitalis superior
4: Fossa sacci lacrimalis
5: Sulcus infraorbitalis
6: Fissura orbitalis inferior
7: Foramen infraorbitale
|Base of the skull. Upper surface. (On the left, "Optic foramen" is the 12th label from the top.|
|Gray's||subject #35 147|
The optic foramen is the opening to the optic canal.
The superior surface of the sphenoid bone is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the chiasmatic groove (optic groove), above and behind which lies the optic chiasma; the groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery (with accompanying sympathetic nerve fibres) into the orbital cavity.
The left and right optic canals are 25mm apart posteriorly and 30mm apart anteriorly. They are funnel-shaped (narrowest anteriorly).
Sphenoid bone. Upper surface.
- SUNY Labs 29:os-0501
- Atlas of anatomy at UMich eye_6 - (look for #3)
- Anatomy at PSU skel/internal2 (look for #10)
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. Template:Skull
Foramina of the skull (and canals, fissures, meati, and hiati)
|Anterior cranial fossa||to Orbit: ethmoidal foramina (anterior, posterior)|
to Nasal cavity: olfactory foramina (CN-I) - foramen cecum
|Middle cranial fossa||to Orbit: optic canal (CN-II) - superior orbital fissure (CN-III,IV,V1,VI) foramen lacerum - hiatus for greater petrosal nerve - hiatus for lesser petrosal nerve - sphenoidal emissary foramen|
|Posterior cranial fossa||internal auditory meatus/facial canal/stylomastoid foramen (CN-VII,VIII) - jugular foramen (CN-IX,X,XI) - foramen magnum (CN-XI) - hypoglossal canal (CN-XII) - condylar canal - mastoid foramen|
|Orbit||to Nasal cavity: nasolacrimal canal|
Pterygopalatine fossa: inferior orbital fissure
|Pterygopalatine fossa||to Nasal cavity: sphenopalatine foramen Nasopharynx: palatovaginal canal|
|Nasal cavity||to Oral cavity: incisive canals - incisive foramen|
|Other||external acoustic meatus - mandibular foramen - mental foramen - parietal foramen - petrotympanic fissure - semilunar hiatus|
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