Quadrangular membrane

Larynx: Quadrangular membrane
Larynx: Quadrangular membrane
	The quadrangular membrane runs from the aryepiglottic fold to the vestibular ligament.
Details
Identifiers
Latin	membrana quadrangularis
TA98	A06.2.09.022
TA2	1658
FMA	55247
	Anatomical terminology [edit on Wikidata]

The quadrangular membrane is a layer of submucosa.^[1]^{[better source needed]} It extends between the lateral margin of the epiglottis, and the apex and fovea triangularis of the ipsilateral arytenoid cartilage. It has free superior and inferior borders.^[2]

Anatomy

The free superior border inclines posteriorly, forming the 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.^[2]

The free inferior border forms the vestibular ligament^[2] (which together with the overlying 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]}

References

^ Prelab Images - Carotid Sheath, Pharynx, & Larynx Archived May 17, 2008, at the Wayback Machine
^ ^a ^b ^c Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York. p. 721. ISBN 978-0-7020-7707-4. OCLC 1201341621.{{cite book}}: CS1 maint: location missing publisher (link)

External links

lesson11 at The Anatomy Lesson by Wesley Norman (Georgetown University) (larynxmembranes)

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[1] Prelab Images - Carotid Sheath, Pharynx, & Larynx Archived May 17, 2008, at the Wayback Machine

[:22422-2] Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York. p. 721. ISBN 978-0-7020-7707-4. OCLC 1201341621.{{cite book}}: CS1 maint: location missing publisher (link)

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