File:Human extraocular muscles 01.jpg

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Human Extraocular Muscles

Cartoon showing attachment of the human 6 extra ocular muscles to the eyeball.

Legend

  • IR - inferior rectus
  • SR - superior rectus
  • LR - lateral rectus
  • MR - medial rectus
  • SO - superior oblique
  • IO - inferior oblique

About the Muscles

  • 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.

divided into two layers with characteristic innervations, fiber types [1], [2], metabolism [3], and gene expression profiles [4], [5], [6]. The inner global layer (GL) inserts on the eye and the similarly sized outer orbital layer (OL) inserts on a connective tissue ring forming the EOM pulley system.

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.

File history

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Date/TimeThumbnailDimensionsUserComment
current12:04, 8 June 2012Thumbnail for version as of 12:04, 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

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