Annulus of zinn
Annulus of Zinn
The Annulus of Zinn (pronounced: /ˈæn.jʊ.ləs ɒv ˈzɪn/), also known as the Common Tendinous Ring, is a ring of fibrous tissue surrounding the optic nerve at the point of its entrance into the orbit. It is named after the German anatomist, Johann Gottfried Zinn.
Etymology
The term "Annulus of Zinn" is derived from the Latin word "annulus" meaning "ring", and "Zinn", the surname of the German anatomist Johann Gottfried Zinn who first described it in detail.
Anatomy
The Annulus of Zinn is a circular band of connective tissue that forms the origin for the four Rectus muscles of the eye: the Superior, Inferior, Medial, and Lateral rectus muscles. It also provides origin to the Superior oblique and Inferior oblique muscles.
Clinical Significance
The Annulus of Zinn is clinically significant as it is involved in several eye conditions. For instance, inflammation or damage to the Annulus of Zinn can lead to Ophthalmoplegia, a condition characterized by paralysis or weakness of the eye muscles. It can also be involved in Optic neuropathy, a condition that causes damage to the optic nerve.
Related Terms
- Optic nerve
- Rectus muscles
- Superior oblique muscle
- Inferior oblique muscle
- Ophthalmoplegia
- Optic neuropathy
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