| Arytenoid muscle | |
|---|---|
 Muscles of larynx. Posterior view. Oblique arytenoid: The "X" in the center. Transverse arytenoid: Bands underneath the "X". Aryepiglotticus: Wraps around back. | |
 | |
| 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 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]
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]
Clinical significance
Electromyography
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]
Other animals
The arytenoid muscle is found in many animals, including dogs.[3]
Additional images
The cartilages of the larynx. Posterior view.
Muscles of larynx. Side view. Right lamina of thyroid cartilage removed.
Aryepiglotic muscle
Muscles of the larynx, seen from above.
Dissection of the muscles of the palate from behind.
References
This article incorporates text in the public domain from page 1082 of the 20th edition of Gray's Anatomy (1918)
- 1 2 Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York. p. 727. ISBN 978-0-7020-7707-4. OCLC 1201341621.
{{cite book}}: CS1 maint: location missing publisher (link) - 1 2 Li, Peng; Liang, Qing-Zhuang; Wang, Dong-Lai; Han, Bin; Yi, Xin; Wei, Wei (October 2019). "Modified arytenoid muscle electrode recording method for neuromonitoring during thyroidectomy". Gland Surgery. 8 (5): 469–476. doi:10.21037/gs.2019.08.07. ISSN 2227-684X. PMC 6842767. PMID 31741877.
- ↑ 隆一, 相原 (1991). "イヌ披裂筋の構造と運動神経支配に関する研究". 日本耳鼻咽喉科学会会報. 94 (6): 805–816. doi:10.3950/jibiinkoka.94.805. PMID 1715914.