Annulus of Zinn

Annulus of Zinn
Annulus of Zinn
Eyemuscles.png
Rectus muscles:
2 = superior, 3 = inferior, 4 = medial, 5 = lateral
Oblique muscles: 6 = superior, 8 = inferior
Other muscle: 9 = levator palpebrae superioris
Other structures: 1 = Annulus of Zinn, 7 = Trochlea, 10 = Superior tarsus, 11 = Sclera, 12 = Optic nerve
Eye orbit anterior.jpg
Anterior view
Latin annulus tendineus communis
Gray's subject #227 1022

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. It is the origin for five of the six extraocular muscles. (Some sources only include four.[1])

It can be used to divide the regions of the superior orbital fissure.[2]

The arteries surrounding the optic nerve are sometimes called the "circle of Zinn-Haller" ("CZH").[3] This vascular structure is also sometimes called "circle of Zinn".

Parts

Some sources distinguish between these terms more precisely, with the annulus tendineus communis being the parent structure, divided into two parts: [4]

  • a lower, the ligament or tendon of Zinn, which gives origin to the Rectus inferior, part of the Rectus internus, and the lower head of origin of the Rectus lateralis.
  • an upper, which gives origin to the Rectus superior, the rest of the Rectus medialis, and the upper head of the Rectus lateralis. This upper band is sometimes termed the superior tendon of Lockwood.

Eponym

It is named for Johann Gottfried Zinn.[5][6] It should not be confused with the Zonule of Zinn, though it is named after the same person.

References

  1. ^ "Anatomy Tables - Eye". http://anatomy.med.umich.edu/nervous_system/eye_tables.html. Retrieved 2008-03-17. 
  2. ^ Shi X, Han H, Zhao J, Zhou C (2007). "Microsurgical anatomy of the superior orbital fissure". Clin Anat 20 (4): 362–6. doi:10.1002/ca.20391. PMID 17080461. 
  3. ^ Ko MK, Kim DS, Ahn YK (1999). "Morphological variations of the peripapillary circle of Zinn-Haller by flat section". Br J Ophthalmol 83 (7): 862–6. doi:10.1136/bjo.83.7.862. PMC 1723100. PMID 10381675. http://bjo.bmj.com/cgi/pmidlookup?view=long&pmid=10381675. 
  4. ^ "eMedicine - Orbit Anatomy : Article by Guy J Petruzzelli". http://www.emedicine.com/Ent/topic4.htm#section~ExtraocularMuscles. Retrieved 2008-03-17. 
  5. ^ synd/3938 at Who Named It?
  6. ^ J. G. Zinn. Descriptio anatomica oculi humani. Göttingen, B. Abrami Vandenhoeck, 1755.

Wikimedia Foundation. 2010.

Поможем решить контрольную работу

Look at other dictionaries:

  • Zinn — Well known people with the surname Zinn include:* Fred Zinn, early American aviator who pioneered aerial photography * Howard Zinn, American historian * Johann Gottfried Zinn, German anatomist and botanist, discoverer of the zonules of Zinn and… …   Wikipedia

  • Johann Gottfried Zinn — (December 6 1727 April 6 1759), was a German anatomist and botanist member of the Berlin Academy Biography Johann Gottfried Zinn was born in Schwabach.Considering his short life span, Zinn made a great contribution to the study of anatomy. In his …   Wikipedia

  • Extraocular muscles — MRI scan showing lateral and medial rectus muscles. Latin musculi externi bulbi oculi Origin …   Wikipedia

  • List of muscles of the human body — Skeletal muscles homo sapiens Muscles of the human body: Overview Head  |  Neck  |&# …   Wikipedia

  • Superior oblique muscle — Superior oblique Rectus muscles: 2 = superior, 3 = inferior, 4 = medial, 5 = lateral Oblique muscles: 6 = superior, 8 = inferior Other muscle: 9 = levator palpebrae superioris …   Wikipedia

  • Superior rectus muscle — Muscle infobox Name = Superior rectus Latin = musculus rectus superior bulbi GraySubject = 227 GrayPage = 1022 Caption = Rectus muscles: 2 = superior, 3 = inferior, 4 = medial, 5 = lateral Oblique muscles: 6 = superior, 8 = inferior Other muscle …   Wikipedia

  • Inferior rectus muscle — Muscle infobox Name = Inferior rectus Latin = musculus rectus inferior bulbi GraySubject = 227 GrayPage = 1022 Caption = Rectus muscles: 2 = superior, 3 = inferior, 4 = medial, 5 = lateral Oblique muscles: 6 = superior, 8 = inferior Other muscle …   Wikipedia

  • Lateral rectus muscle — Muscle infobox Name = Lateral rectus Latin = musculus rectus lateralis bulbi GraySubject = 227 GrayPage = 1022 Caption = Rectus muscles: 2 = superior, 3 = inferior, 4 = medial, 5 = lateral Oblique muscles: 6 = superior, 8 = inferior Other muscle …   Wikipedia

  • Medial rectus muscle — Medial rectus Rectus muscles: 2 = superior, 3 = inferior, 4 = medial, 5 = lateral Oblique muscles: 6 = superior, 8 = inferior Other muscle: 9 = levator palpebrae superioris O …   Wikipedia

  • Inferior oblique muscle — Inferior oblique Rectus muscles: 2 = superior, 3 = inferior, 4 = medial, 5 = lateral Oblique muscles: 6 = superior, 8 = inferior Other muscle: 9 = levator palpebrae superioris …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”