Arytenoid muscle
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.
| Arytenoid muscle | |
|---|---|
Muscles of larynx. Posterior view. Oblique arytenoid: The "X" in the center. Transverse arytenoid: Bands underneath the "X". Aryepiglotticus: Wraps around back. | |
Sagittal section of the larynx and upper part of the trachea. (Arytenoideus visible at center right.) | |
| 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 | |
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)).
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