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Aryepiglottic fold

Recommended video: Larynx [30:35]
Cartilages, ligaments, membranes and muscles of the larynx.

The aryepiglottic fold is a fold of mucous membrane forming the lateral border of the laryngeal inlet, which contains ligamentous and muscular fibers. The ligamentous fibers are the free superior edge of the quadrangular membrane known as the aryepiglottic ligament, which comprises the central component of the aryepiglottic fold and connects the arytenoid cartilages to the lateral borders of the epiglottis

The muscular fibers are known as the aryepiglottic muscles, which are continuations of the oblique arytenoids. Some fibers of the thyroarytenoid also extend into the aryepiglottic fold.

The posterior aspects of the aryepiglottic folds contain two pairs of oval shaped nodules which represent the positions of the underlying cuneiform and corniculate cartilages. The superior of the two are the cuneiform cartilages, which are not directly attached to any other cartilages, rather are suspended within the fold. The inferior nodules are the corniculate cartilages, which attach to the apex of the arytenoid cartilages. 

Terminology English: Aryepiglottic fold
Latin: Plica aryepiglottica
Definition Fold of mucous membrane extending from the arytenoid cartilages to the lateral borders of the epiglottis, containing ligamentous and muscular fibers. 
Contents aryepiglottic ligament (free edge of quadrangular membrane), aryepiglottic muscle (continuation of oblique arytenoid), thyroarytenoid fibers, cuneiform cartilage, corniculate cartilage

Learn more anatomy of the larynx with this study unit (and article):

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