File:Human extraocular muscles 01.jpg: Difference between revisions

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* The sixth muscle (inferior oblique) has a separate origin point on the orbital side of the bony maxilla at the anterior inferomedial strut.
* The sixth muscle (inferior oblique) has a separate origin point on the orbital side of the bony maxilla at the anterior inferomedial strut.
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{|
{|
! Muscle Structure  
! Muscle Structure  
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| colspan=2|Each muscle has 2 equally sized layers.
| colspan=2|Each muscle has 2 equally sized layers.
|-
|-
| outer orbital layer
! Layer
| inserts on a connective tissue (pulley) ring
! Inserts
! Single innervation (%)
|-
| outer orbital
| connective tissue ring
| 80
|-
|-
| inner global layer
| inner global
| inserts on the eye sclera.
| eye sclera
| 90
|}
|}




(Text modified from figure legend and paper text)
{{Vision Links}}
<br>
[[Musculoskeletal_System_-_Muscle_Development|'''Muscle Development''']]


===Reference===
===Reference===

Latest revision as of 10:00, 30 October 2017

Human Extraocular Muscles

Cartoon showing attachment of the human 6 extraocular muscles to the eyeball.

Legend About the Muscles
  • IR - inferior rectus
  • SR - superior rectus
  • LR - lateral rectus
  • MR - medial rectus
  • SO - superior oblique
  • IO - inferior oblique
  • Five of the six muscles (inferior rectus, superior rectus, lateral rectus, medial rectus, and superior oblique) originate at a common tendinous ring of fibrous tissue (the Annulus of Zinn).
    • The Annulus of Zinn surrounds the optic nerve, ophthalmic artery, and ophthalmic vein at their entrance through the apex of the orbit.
  • The sixth muscle (inferior oblique) has a separate origin point on the orbital side of the bony maxilla at the anterior inferomedial strut.


Muscle Structure
Each muscle has 2 equally sized layers.
Layer Inserts Single innervation (%)
outer orbital connective tissue ring 80
inner global eye sclera 90


Vision Links: vision | lens | retina | placode | extraocular muscle | cornea | eyelid | lacrima gland | vision abnormalities | Student project 1 | Student project 2 | Category:Vision | sensory
Historic Embryology - Vision 
Historic Embryology: 1906 Eye Embryology | 1907 Development Atlas | 1912 Eye Development | 1912 Nasolacrimal Duct | 1917 Extraocular Muscle | 1918 Grays Anatomy | 1921 Eye Development | 1922 Optic Primordia | 1925 Eyeball and optic nerve | 1925 Iris | 1927 Oculomotor | 1928 Human Retina | 1928 Retina | 1928 Hyaloid Canal | Historic Disclaimer


Muscle Development

Reference

<pubmed>22132088</pubmed>| PLoS One.

Citation: Kasprick DS, Kish PE, Junttila TL, Ward LA, Bohnsack BL, et al. (2011) Microanatomy of Adult Zebrafish Extraocular Muscles. PLoS ONE 6(11): e27095. doi:10.1371/journal.pone.0027095

Copyright

© 2011 Kasprick et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Figure 1. doi:10.1371/journal.pone.0027095.g001 Pone.0027095.g001.jpg Text modified from figure legend and paper text.


Cite this page: Hill, M.A. (2024, March 28) Embryology Human extraocular muscles 01.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Human_extraocular_muscles_01.jpg

What Links Here?
© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

File history

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Date/TimeThumbnailDimensionsUserComment
current13:04, 8 June 2012Thumbnail for version as of 13:04, 8 June 2012500 × 600 (47 KB)Z8600021 (talk | contribs)==Human Extraocular Muscles== Illustration of human eye showing 6 EOMs inserting on the globe in what is referred to as the Spiral of Tillaux. ===Reference== <pubmed>22132088</pubmed>| [http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone