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What is the superior orbital fissure?

What is the superior orbital fissure?

The superior orbital fissure is a bony cleft found at the orbital apex between the roof and lateral wall. It is a communication between the orbital cavity and middle cranial fossa and is bounded by the greater wing, lesser wing and body of sphenoid.

How do you remember the contents of superior orbital fissure?

Mnemonics for the nerves passing through the superior orbital fissure include:

  1. Lazy French Tarts Sit Nakedly In Anticipation.
  2. Live Frankly To See Absolutely No Insult.
  3. Live Free To See No Insult At All.

What does the superior orbital fissure connect?

The superior orbital fissure is a foramen at the back of the orbit that separates the orbital roof from the lateral wall of the orbit and connects the orbit to the cavernous sinus in the brain.

What is the difference between the optic canal and the superior orbital fissure?

The superior orbital fissure is the largest opening that connects the orbit with the middle cranial fossa. [1] The optic canal connects the orbit to the middle cranial fossa and transmits the optic nerve, ophthalmic artery, meningeal sheaths, and sympathetic nerve fibers.

Which nerve does not pass through the superior orbital fissure?

Correct Answer: Ophthalmic artery.

What is fissure in skull?

In this way, fissures of the skull are very similar to foramina, in that they are also passageways through bone. They are called fissures simply because they are a different shape of hole, they look more like a crack or cleft, and typically occur between separate anatomical structures.

What nerve exits 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 is common tendinous ring?

The common tendinous ring, also known as the annulus of Zinn, or annular tendon, is a ring of fibrous tissue surrounding the optic nerve at its entrance at the apex of the orbit. It is the common origin of the four recti muscles of the group of extraocular muscles.

How superior orbital fissure is formed?

The superior orbital fissure is a foramen or cleft in the skull. It lies between the lesser and greater wings of the sphenoid bone….

Superior orbital fissure
Part of sphenoid bone
System skeletal
Identifiers
Latin fissura orbitalis superior

What courses go through superior orbital fissure?

Numerous structures pass through the SOF: the oculomotor (III) and trochlear nerves (IV), the ophthalmic division of the trigeminal nerve (VI) with its frontal, lacrimal, and nasociliary branch, the abducens nerve (VI), and both the ophthalmic veins, superior and inferior.

Is the superior orbital fissure in the sphenoid bone?

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 the difference between fracture and fissure?

A fault is a fracture on which the walls have been relatively displaced to a significant degree parallel to the fracture. A fissure is a fracture whose walls have been opened significantly by sepa- ration in a direction normal to the plane of the fracture.

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 are the signs and symptoms of orbital fissure cancer?

Tumors within the orbital apex/superior orbital fissure and cavernous sinus (Table 11.5) primarily produce symptoms and signs related to ocular motor nerve dysfunction. However, there may also be optic nerve dysfunction, oculosympathetic dysfunction, and trigeminal neuropathy.

What structures pass through the fissure in the orbit?

A number of important anatomical structures pass through the fissure, and these can be damaged in orbital trauma, particularly blowout fractures through the floor of the orbit into the maxillary sinus. These structures are: lacrimal, frontal and nasociliary branches of ophthalmic (V 1 ). superior and inferior divisions of ophthalmic vein.

What are the treatment options for orbital fissures?

In certain cases, a combination of treatment options may be appropriate, such as a megadose corticosteroid treatment combined with surgical intervention . If the superior orbital fissure is compressed or narrowed by a facture, surgical decompression may be beneficial .