Superior orbital fissure

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Superior orbital fissure
Sobo 1909 95.png
Orbit seen from the front, with bones labeled in different colors, and superior orbital fissure at center as an "hour-glass" formation.
Orbita mensch.jpg
Details
Latin fissura orbitalis superior
Identifiers
Dorlands
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Anatomical terms of bone
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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.

Structures passing through

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:

These include nonvisual sensory messages, such as pain, or motor nerves. They also serve as vascular connections.[1]

The nerves passing through the fissure can be remembered with the mnemonic, "Live Frankly To See Absolutely No Insult" - for Lacrimal, Frontal, Trochlear, Superior Division of Oculomotor, Abducens, Nasociliary and Inferior Division of Oculomotor nerve.[2]

It is divided into 3 parts from lateral to medial:

Pathology

The abducens nerve is most likely to show signs of damage first, with the most common complaints retro-orbital pain and the involvement of cranial nerves III, IV, V1, and VI without other neurological signs or symptoms. This presentation indicates either compression of structures in the superior orbital fissure or the cavernous sinus.

Superior orbital fissure syndrome

Superior orbital fissure syndrome, also known as Rochon-Duvigneaud's syndrome,[3][4] 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, exophthalmos, and ptosis. Blindness or loss of vision indicates involvement of the orbital apex, which is more serious, requiring urgent surgical intervention. Typically, if blindness is present with superior orbital syndrome, it is called orbital apex syndrome.

Additional images

  • Sphenoid bone. Upper surface

  • Sphenoid bone. Upper and posterior surfaces

  • Gray190.png

    The skull from the front

  • Skull foramina labeled.svg

    Photo of skull with major foramina labeled

  • Dissection showing origins of right ocular muscles, and nerves entering by the

  • Human skull from front and behind with calvarium removed. White area in posterior of orbital cavity is the superior orbital fissure.

  • Superior orbital fissure.

See also

References

  1. ↑ "eye, human."Encyclopædia Britannica from Encyclopædia Britannica 2006 Ultimate Reference Suite DVD
  2. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ synd/3387 at Who Named It?
  4. ↑ A. Rochon-Duvigneaud. Quelques cas de paralysie de tous les nerfs orbitaires (ophthalmoplegie totale avec amaurosse en anesthésie dans le domaine de l’ophthalmique d’origine syphilitique). Archives d'ophthalmologie, Paris, 1896, 16: 746-760.

External links

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