Lateral to either olfactory groove are the internal openings of the anterior and posterior ethmoidal foramina (or canals).
| Posterior ethmoidal foramen | |
|---|---|
 Base of the skull. Upper surface. (On the left, "Posterior ethmoidal foramen" is the 9thlabel from the right. | |
 1 Foramen ethmoidale, 2 Canalis opticus, 3 Fissura orbitalis superior, 4 Fossa sacci lacrimalis, 5 Sulcus infraorbitalis, 6 Fissura orbitalis inferior, 7 Foramen infraorbitale | |
| Details | |
| Identifiers | |
| Latin | foramen ethmoidale posterius |
| TA98 | A02.1.00.080 |
| TA2 | 485 |
| FMA | 53136 |
| Anatomical terms of bone | |
The posterior ethmoidal foramen opens at the back part of this margin under cover of the projecting lamina of the sphenoid, and transmits the posterior ethmoidal vessels and nerve.
Additional images
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Frontal bone. Inner surface. -
Left maxillary sinus opened from the exterior. -
The ophthalmic artery and its branches. -
Labeled photo of foramina of skull base.
External links
- lesson3 at The Anatomy Lesson by Wesley Norman (Georgetown University) (orbitforamina) (#4)
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