The inferior orbital fissure (IOF) lies in the floor of the orbit inferior to the superior orbital fissure and it is bounded superiorly by the greater wing of sphenoid, inferiorly by maxilla and orbital process of palatine bone and laterally by the zygomatic bone. It opens into posterolateral aspect of orbital floor.
What enters through inferior orbital fissure?
The structures entering through the inferior orbital fissure are as follows: Infraorbital nerve. Zygomatic nerve. Parasympathetics to lacrimal gland.
What nerve passes the inferior orbital fissure?
Description. 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 passes through superior and inferior orbital fissure?
Structures passing through this fissure : superior and inferior divisions of oculomotor nerve (III), trochlear nerve (IV), lacrimal, frontal and nasociliary branches of ophthalmic (V1), abducens nerve (VI), superior and inferior divisions of ophthalmic vein, inferior division also passes through the inferior orbital
Where is the orbital fissure located?
The superior orbital fissure lies between the lesser and greater wings of the sphenoid bone. It is between the optic canal (in front) and the foramen rotundum (behind).
What is the function of the superior orbital fissure?
Function. The superior orbital fissure functions as a bony aperture through which many important structures pass from the brain into the orbit.
Which nerves pass through superior orbital fissure?
This fissure, which separates the greater and lesser wings of the sphenoid and lies between the optic foramen and the foramen rotundum, provides passage to the three motor nerves to the extraocular muscles of the orbit: oculomotor nerve (CN III), trochlear nerve (CN IV), and abducens nerve (CN VI).
What separates the optic canal from the superior orbital fissure?
The optic canals are situated above and are separated from the superomedial margin of the superior orbital fissure by the optic strut, a bridge of bone that extends from the lower margin of the base of the anterior clinoid process to the body of the sphenoid.
What are the main contents of the orbit?
The orbital contents comprise the eye, the orbital and retrobulbar fascia, extraocular muscles, cranial nerves II, III, IV, V, and VI, blood vessels, fat, the lacrimal gland with its sac and duct, the eyelids, medial and lateral palpebral ligaments, check ligaments, the suspensory ligament, septum, ciliary ganglion and
What bones make up the superior orbital fissure?
The superior orbital fissure lies between the greater and lesser wings of the sphenoid bone. Passing through the superior orbital fissure into the orbit and above the common tendinous ring are the lacrimal nerve of CN V1, the frontal nerve of CN V1, CN IV (trochlear nerve), and the superior ophthalmic vein.
What bones make up inferior orbital fissure?
The inferior orbital fissure lies on the floor of the orbit. The superior border is the greater wing of the sphenoid, and the maxilla and palatine bone compose the inferior border, with the zygomatic bone laterally.
What nerves go through the orbital fissure?
The order of the nerves passing through the superior orbital fissure from superior to inferior:
L: lacrimal nerve (branch of CN V1)F: frontal nerve (branch of CN V1)T: trochlear nerve (CN IV)S: superior division of the oculomotor nerve (CN III)N: nasociliary nerve (branch of CN V1)
