What are the superior and inferior orbital fissure? The superior orbital fissure is bounded by the lesser and greater wings of the sphenoid. The greater wing of the sphenoid, the maxilla, and the palatine bones
What are the superior and inferior orbital fissure?
The superior orbital fissure is bounded by the lesser and greater wings of the sphenoid. The greater wing of the sphenoid, the maxilla, and the palatine bones of the orbit form the boundaries of the inferior orbital fissure. The optic canal is at the apex of the orbit and lies within the sphenoid bone.
What passes through the superior orbital fissure?
The lacrimal, frontal and trochlear nerves, as well as the ophthalmic vein, pass through the superior orbital fissure outside of the annulus of Zinn. The superior and inferior divisions of cranial nerve III, cranial nerve VI, and the nasociliary nerve pass through the fissure within the Annulus of Zinn.
What does the inferior orbital fissure do?
The lateral wall and the floor of the orbit are separated posteriorly by the inferior orbital fissure which transmits the maxillary nerve and its zygomatic branch, and the ascending branches from the pterygopalatine ganglion.
What makes the superior orbital fissure?
The superior orbital fissure is the communication between the cavernous sinus and the apex of the orbit. It is straddled by the tendinous ring which is the common origin of the four rectus muscles (extraocular muscles).
What comes out of the inferior orbital fissure?
The infraorbital vessels are found in the inferior orbital fissure, and travel down the infraorbital groove into the infraorbital canal and exit through the infraorbital foramen. Inferior division of ophthalmic vein passes through the inferior orbital fissure….
| Inferior orbital fissure | |
|---|---|
| FMA | 54802 |
| Anatomical terminology |
What is the difference between a foramen and a fissure?
Fissure – An open slit in a bone that usually houses nerves and blood vessels. Foramen – A hole through which nerves and blood vessels pass. Examples include supraorbital foramen, infraorbital foramen, and mental foramen on the cranium. Fossa – A shallow depression in the bone surface.
What traverses the inferior orbital fissure?
The maxillary nerve exits from the cranial cavity through the foramen rotundum. From this point, the nerve traverses the superior part of the pterygopalatine fossa and swings laterally to traverse the inferior orbital fissure toward the maxillary sinus.
What is superior orbital?
The superior orbital fissure is a foramen in the skull, although strictly it is more of a cleft, lying between the lesser and greater wings of the sphenoid bone .
What is superior orbital fissure syndrome?
Superior orbital fissure syndrome. Superior orbital fissure syndrome, also known as Rochon-Duvigneaud’s syndrome, is a neurological disorder that results if the superior orbital fissure is fractured. Involvement of the cranial nerves that pass through the superior orbital fissure may lead to diplopia, paralysis of extraocular muscles,…
What is orbital apex?
The orbital apex is anatomically the posterior part of the orbit positioned at the craniofacial junction located where the four orbital walls converge. The orbital apex incorporates the optic canal and the superior orbital fissure.