Annular tendon [Neurosurgery Wiki]

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=====Annular tendon=====
{{http://www.3dneuroanatomy.com/wp-content/uploads/2014/12/orb8.jpg}}

http://www.3dneuroanatomy.com/wp-content/uploads/2014/12/orb8.jpg

The annular tendon (yellow circle ) is a fibrous structure where the orbital muscles are attached. The annular tendon is attached along the upper, medial, and lower margins of the [[optic canal]], and to a bony prominence at the midportion of the lateral edge of the [[superior orbital fissure]]. All the components of the orbita pass trough the annular tendon but the fourth, the frontal, the [[lacrimal nerve]]s and the [[ophthalmic vein]].

The central sector of the superior orbital fissure, referred to as the oculomotor foramen ( red circle ) because it is the part of the fissure through which the oculomotor nerve passes, contains also the nasociliar nerve and the abducens nerve.

AO: [[ophthalmic artery]]; NC: [[nasociliary nerve]]; V1 fron: [[frontal nerve]]; V1lac: [[lacrimal nerve]]; vO: [[ophthalmic vein]]; IIIs: superior division of the [[oculomotor nerve]]; IIIi: inferior division of the oculomotor nerve.

Yellow circle: annular tendon. Red circle: oculomotor foramen.