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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.
The function of the cricoid cartilage is to provide attachments for the cricothyroid muscle, posterior cricoarytenoid muscle and lateral cricoarytenoid muscle muscles, cartilages, and ligaments involved in opening and closing the airway and in speech production. [citation needed]
The cricoarytenoid joint is a joint connecting the cricoid cartilage and the arytenoid cartilage. It is a very shallow ball-and-socket joint. It allows for rotation and gliding motion. This controls the abduction and adduction of the vocal cords.
Cricoarytenoid muscles are muscles that connect the cricoid cartilage and arytenoid cartilage. More specifically, it can refer to: Posterior cricoarytenoid muscle
The posterior cricoarytenoid muscles, the only muscles that can open the vocal folds, are innervated by this nerve. The recurrent laryngeal nerves are the nerves of the sixth pharyngeal arch. The existence of the recurrent laryngeal nerve was first documented by the physician Galen.
The rima glottidis is closed by the lateral cricoarytenoid muscles and the arytenoid muscle, and opened by the posterior cricoarytenoid muscles.All of these muscles receive innervation from the recurrent laryngeal nerve which is a branch of the vagus nerve (CN X).
Just above the vocal process is a shallow depression, the oblong fovea of the arytenoid cartilage. Together they constitute the insertion for the vocalis muscle. [3] Vocal process granulomas are rare and benign lesions that occur in 0.9–2.7% of adults with a voice disorder. Most occurrences and forms of vocal process granulomas regress ...
cricoarytenoid, posterior: head, larynx (left/right) posterior part of cricoid cartilage: muscular process of arytenoid cartilage: vagus nerve [CNX], recurrent laryngeal nerve: abducts and laterally rotates cartilage, pulling vocal ligaments away from midline and forward and so opening rima glottidis: lateral cricoarytenoid: 2 1 cricoarytenoid ...