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 | |
|---|---|
 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 |
| 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)).[1]
Clinical significance
editElectromyography
editFunction 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
editThe arytenoid muscle is found in many animals, including dogs.[3]
Additional images
edit-
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
edit
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
- ^ a b 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) - ^ a b 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.
