Muscular system
Common tendinous ring
Anulus tendineus communis
- System
- Muscular system
- Regions
- Head
- Side
- Left and right
- Part of
- Extra-ocular muscles
DescriptionUnreviewed
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.
It can be used to divide the regions of the superior orbital fissure.
The arteries surrounding the optic nerve form a vascular structure known as the circle of Zinn-Haller, or sometimes as the circle of Zinn.
The following structures pass through the tendinous ring (superior to inferior):
- Superior division of the oculomotor nerve (CNIII)
- Nasociliary nerve (branch of ophthalmic nerve)
- Inferior division of the oculomotor nerve (CNIII)
- Abducens nerve (CNVI)
- Optic nerve
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Source: Wikipedia · Text licence: CC BY-SA 3.0 · This text comes from the source data and has not been reviewed by a person yet.
Names
- Latin
- Anulus tendineus communis
- English
- Common tendinous ring
- French
- Anneau tendineux commun
- Spanish
- Anillo tendinoso común
- Portuguese
- Anel tendíneo comum