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Posterior cricoarytenoid muscle information


Posterior cricoarytenoid
Muscles of larynx. Side view. Right lamina of thyroid cartilage removed.
Details
OriginPosterior part of the cricoid
InsertionPosterior surface of muscular process of the arytenoid cartilage
NerveRecurrent laryngeal nerve branch of the vagus nerve (CN X)
ActionsAbducts and laterally rotates arytenoid cartilage, pulling vocal ligaments away from the midline and forward and so opening rima glottidis
AntagonistLateral cricoarytenoid muscle
Identifiers
Latinmusculus cricoarytaenoideus posterior
TA98A06.2.08.004
TA22196
FMA46576
Anatomical terms of muscle
[edit on Wikidata]

The posterior cricoarytenoid muscle is a (bilaterally paired) intrinsic muscle of the larynx. It arises from the cricoid cartilage; it inserts onto the arytenoid cartilage of the same side. It is innervated by the recurrent laryngeal nerve. Each acts to open the vocal folds by pulling the vocal fold of the same side laterally. It participates in the production of sounds.

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