Annulus of Zinn

common tendinous ringanulus tendineusAnulus tendineus communisCircle of Zinn-Hallerthe tendinous ring
The annulus of Zinn, also known as the annular tendon or common tendinous ring, is a ring of fibrous tissue surrounding the optic nerve at its entrance at the apex of the orbit.wikipedia
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Extraocular muscles

extraocular muscleeye muscleseye muscle
It is the common origin of the four rectus muscles (extraocular muscles).
Four of the extraocular muscles have their origin in the back of the orbit in a fibrous ring called the annulus of Zinn: the four rectus muscles.

Medial rectus muscle

medial rectusmedialmedial recti
This muscle shares an origin with several other extrinsic eye muscles, the anulus tendineus, or common tendon.

Lateral rectus muscle

lateral rectuslateralRectus lateralis
The lateral rectus originates at the lateral part of the annulus of Zinn, also known as the annular tendon or common tendinous ring, and inserts into the temporal side of the eyeball.

Inferior oblique muscle

inferior obliqueinferiorObliquus inferior
Unlike the other extraocular muscles (recti and superior oblique), the inferior oblique muscle does not originate from the common tendinous ring (annulus of Zinn).

Johann Gottfried Zinn

Zinn
It is named for Johann Gottfried Zinn.

Levator palpebrae superioris muscle

levator palpebrae superiorislevator palpebraeLevator palpebræ superioris

Optic nerve

optic nervesoptical nerveoptic
The annulus of Zinn, also known as the annular tendon or common tendinous ring, is a ring of fibrous tissue surrounding the optic nerve at its entrance at the apex of the orbit.

Orbit (anatomy)

orbitorbitseye socket
The annulus of Zinn, also known as the annular tendon or common tendinous ring, is a ring of fibrous tissue surrounding the optic nerve at its entrance at the apex of the orbit.

Superior orbital fissure

Fissura orbitalis superiorSphenoidal fissureRochon-Duvigneaud's syndrome
It can be used to divide the regions of the superior orbital fissure.

Zonule of Zinn

suspensory ligament of the lenszonular fibersciliary zonule
It should not be confused with the zonule of Zinn, though it is named after the same person.

Annulus

Eye movement

eye movementsversionexcyclotorsion
These muscles arise from the common tendinous ring in the orbit, the eye cavity, and attach to the eyeball.

Frontal nerve

frontal
It enters the orbit through the superior orbital fissure, not running within the tendinous ring, and runs forward between the levator palpebrae superioris and the periosteum.