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Posterior cricoarytenoid muscle
Template:Muscle infobox 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.[1]
Additional images
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The cartilages of the larynx. Posterior view.
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Muscles of larynx. Posterior view.
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Muscles of the larynx, seen from above.
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Dissection of the muscles of the palate from behind.
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Posterior cricoarytenoid muscle
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Posterior cricoarytenoid muscle
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Posterior cricoarytenoid muscle
References
- ↑ The Arytenoid Cartilages - a clinical overview. 2002, Dr. C Kay et al. Thorne Publishing (C)
External links
- Template:MuscleLoyola
- Template:UMichAtlas
- posterior+cricoarytenoid+muscle at eMedicine Dictionary
- Template:NormanAnatomy (Template:NormanAnatomyFig)
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ja:後輪状披裂筋 pt:Músculo cricoaritenóideo posterior sr:Задњи крикоаритеноидни мишић sh:Zadnji krikoaritenoidni mišić pl:Mięsień pierścienno-nalewkowy tylny
