The arytenoid muscle /ærɪˈtiːnɔɪd/ or interarytenoid muscle is a composite intrinsic muscle of the larynx, consisting of a transverse part and an oblique part - the two parts may be considered as separate muscles: an unpaired transverse arytenoid muscle, and a bilaterally paired oblique arytenoid muscle.[1]
Arytenoid muscle | |
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Details | |
Origin | Arytenoid cartilage on one side |
Insertion | Arytenoid cartilage on opposite side |
Artery | superior laryngeal artery |
Nerve | recurrent laryngeal branch of the vagus |
Actions | approximate the arytenoid cartilages (close rima glottis) |
Identifiers | |
Latin | musculus arytaenoideus |
TA98 | A06.2.08.012 A06.2.08.010 |
TA2 | 2203, 2205 |
FMA | 46582 |
Anatomical terms of muscle [edit on Wikidata] |
The two constituent parts differ in their attachments, structure and actions. Both receive motor innervation from the recurrent laryngeal nerve(s) (each nerve being a branch of one vagus nerve (CN X)).[1]
Function of the arytenoid muscle is a good method to determine function of the recurrent laryngeal nerve.[2] Continuous electromyography of the arytenoid muscle can provide confidence to surgeons that the recurrent laryngeal nerve is not damaged during neck surgeries, such as thyroidectomy.[2]
The arytenoid muscle is found in many animals, including dogs.[3]
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