Muscular Process Of Arytenoid Cartilage

	Muscular Process Of Arytenoid Cartilage The muscular process of arytenoid cartilage is the posterolateral projection of the (short, rounded, and prominent) lateral angle of the base of the arytenoid cartilage. The muscular process gives insertion to the posterior cricoarytenoid muscles behind, and to the lateral cricoarytenoid muscle The lateral cricoarytenoid (also anterior cricoarytenoid) muscles extend from the lateral cricoid cartilage to the muscular process of the arytenoid cartilage. By rotating the arytenoid cartilages medially, these muscles adduct the vocal cords an ...s in front. References Human head and neck {{musculoskeletal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Arytenoid Cartilage The arytenoid cartilages () are a pair of small three-sided pyramids which form part of the larynx. They are the site of attachment of the vocal cords. Each is pyramidal or ladle-shaped and has three surfaces, a base, and an apex. The arytenoid cartilages allow for movement of the vocal cords by articulating with the cricoid cartilage. It may be affected by arthritis, dislocations, or sclerosis. Structure The arytenoid cartilages are part of the posterior part of the larynx. Surfaces The posterior surface is triangular, smooth, concave, and gives attachment to the arytenoid muscle and transversus. The antero-lateral surface is somewhat convex and rough. On it, near the apex of the cartilage, is a rounded elevation (colliculus) from which a ridge (crista arcuata) curves at first backward and then downward and forward to the vocal process. The lower part of this crest intervenes between two depressions or foveæ, an upper, triangular, and a lower oblong in shape; the latt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Posterior Cricoarytenoid Muscle The posterior cricoarytenoid muscles are small, paired intrinsic muscles of the larynx that extend between cricoid cartilage to the arytenoid cartilages in the larynx. Structure Origin and insertion The posterior cricoarytenoid originates from the posterior surface of the posterior quadrate lamina of the cricoid cartilage. It inserts onto the muscular process of the arytenoid cartilage. Its distinct medial and lateral bellies insert onto opposite surfaces of the muscular process. Nerve supply The posterior cricoarytenoid muscles are supplied by the anterior division of the recurrent laryngeal nerve, a branch of the vagus nerve (CN X). Sometimes, different parts of the muscle (such as the medial and lateral muscle bellies) are supplied by separate branches. This may vary between 1 and 6 branches, usually 2 or 3. These may connect within the muscle. Function The posterior cricoarytenoid muscles are the only muscles to open the vocal cords. By rotating the arytenoid car ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Lateral Cricoarytenoid Muscle The lateral cricoarytenoid (also anterior cricoarytenoid) muscles extend from the lateral cricoid cartilage to the muscular process of the arytenoid cartilage. By rotating the arytenoid cartilages medially, these muscles adduct the vocal cords and thereby close the rima glottidis, protecting the airway. (Their action is antagonistic to that of the posterior cricoarytenoid muscles.) The lateral cricoarytenoid muscles receive innervation from the recurrent laryngeal branch of the vagus nerve (CN X). Additional images File:Gray960.png, Muscles of the larynx, seen from above. See also * Cricoid cartilage The cricoid cartilage , or simply cricoid (from the Greek ''krikoeides'' meaning "ring-shaped") or cricoid ring, is the only complete ring of cartilage around the trachea. It forms the back part of the voice box and functions as an attachment si ... * Arytenoid cartilage External links * * () Muscles of the head and neck {{muscle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]