http://debianws.lexgopc.com/wiki143/index.php?action=history&feed=atom&title=Quadrangular_membraneQuadrangular membrane - Revision history2026-05-11T20:28:23ZRevision history for this page on the wikiMediaWiki 1.43.1http://debianws.lexgopc.com/wiki143/index.php?title=Quadrangular_membrane&diff=6262736&oldid=previmported>Jay Hodec at 23:12, 18 July 20232023-07-18T23:12:15Z<p></p>
<p><b>New page</b></p><div>{{Short description|Anatomical term for specific tissue in the throat}}<br />
{{Infobox anatomy<br />
| Name = Larynx: Quadrangular membrane<br />
| Latin = membrana quadrangularis<br />
| Image = Gray954.png<br />
| Caption = The quadrangular membrane runs from the aryepiglottic fold to the vestibular ligament.<br />
| Image2 =<br />
| Caption2 =<br />
| Precursor =<br />
| System =<br />
| Artery =<br />
| Vein =<br />
| Nerve =<br />
| Lymph =<br />
}}<br />
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The '''quadrangular membrane''' is a layer of [[submucosa]].<ref>[http://anatomy.med.umich.edu/nervous_system/deepneck_pre.html Prelab Images - Carotid Sheath, Pharynx, & Larynx<!-- Bot generated title -->] {{webarchive |url=https://web.archive.org/web/20080517214829/http://anatomy.med.umich.edu/nervous_system/deepneck_pre.html |date=May 17, 2008 }}</ref>{{Better source needed|reason=The current source is insufficiently reliable ([[WP:NOTRS]]).|date=July 2023}} It extends between the lateral margin of the [[epiglottis]], and the apex and fovea triangularis of the [[ipsilateral]] [[arytenoid cartilages|arytenoid cartilage]]. It has free superior and inferior borders.<ref name=":22422">{{Cite book |last=Standring |first=Susan |url=https://www.worldcat.org/oclc/1201341621 |title=Gray's Anatomy: The Anatomical Basis of Clinical Practice |year=2020 |isbn=978-0-7020-7707-4 |edition=42th |location=New York |pages=721 |oclc=1201341621}}</ref><br />
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== Anatomy ==<br />
The free superior border inclines posteriorly, forming the [[Aryepiglottic fold|aryepiglottic ligament]] (the central component of the [[aryepiglottic fold]] within which the [[cuneiform cartilages]] are contained). Posteriorly, it contributes to the formation of the median corniculopharyngeal ligament.<ref name=":22422" /><br />
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The free inferior border forms the [[vestibular ligament]]<ref name=":22422" /> (which together with the overlying [[Mucous membrane|mucosa]] constitutes the [[vestibular fold]]). The lower fibres of the quadrangular ligament condense to form the false vocal cords or the vestibular fold, while the upper fibres of the cricovocal ligaments condense to form the true vocal cord. The superior border is in the [[aryepiglottic fold]].{{Citation needed|date=July 2023}}<br />
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==References==<br />
{{Reflist}}<br />
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==External links==<br />
* {{NormanAnatomy|lesson11}} ({{NormanAnatomyFig|larynxmembranes}})<br />
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{{Larynx anatomy}}<br />
{{Authority control}}<br />
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[[Category:Human head and neck]]<br />
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{{anatomy-stub}}</div>imported>Jay Hodec