posterior crico-arytenoid

cricoarytaenoideus posterior

The posterior cricoarytenoid muscles are extremely small, paired muscles that extend from the posterior cricoid cartilage to the arytenoid cartilages in the larynx. By rotating the arytenoid cartilages laterally, these muscles abduct the vocal cords and thereby open the rima glottidis. Their action opposes the lateral cricoarytenoid muscles. The posterior cricoarytenoid muscles receive innervation from the recurrent laryngeal branch of the vagus nerve (CN X). Paralysis of the posterior cricoarytenoid muscles may lead to asphyxiation as they are the only laryngeal muscles to open the true vocal folds, allowing inspiration and expiration.

Type Muscle
Structure parente crico-arytenoid muscle
Nom latin cricoarytaenoideus posterior
FMA ID 46576

Questions fréquentes

What is the posterior crico-arytenoid?
The posterior cricoarytenoid muscles are extremely small, paired muscles that extend from the posterior cricoid cartilage to the arytenoid cartilages in the larynx. By rotating the arytenoid cartilages laterally, these muscles abduct the vocal cords and thereby open the rima glottidis. Their action
What is the Latin name for the posterior crico-arytenoid?
The Latin name for the posterior crico-arytenoid is cricoarytaenoideus posterior.

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Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.