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Arytenoid muscle

Muscle of the larynx

Field	Value
Name	Arytenoid muscle
Latin	musculus arytaenoideus
Image	Musculusarytenoideus.png
Caption	Muscles of larynx. Posterior view.
Oblique arytenoid: The "X" in the center.
Transverse arytenoid: Bands underneath the "X".
Aryepiglotticus: Wraps around back.
Image2	Gray953.png
Caption2	Sagittal section of the larynx and upper part of the trachea. (Arytenoideus visible at center right.)
Origin	Arytenoid cartilage on one side
Insertion	Arytenoid cartilage on opposite side
Blood	Superior laryngeal artery
Nerve	Recurrent laryngeal branch of the vagus
Action	Approximate the arytenoid cartilages (close rima glottis)

Oblique arytenoid: The "X" in the center. Transverse arytenoid: Bands underneath the "X". Aryepiglotticus: Wraps around back. The arytenoid muscle 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.

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)).

Clinical significance

Electromyography

Function of the arytenoid muscle is a good method to determine function of the recurrent laryngeal nerve. 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.

Other animals

The arytenoid muscle is found in many animals, including dogs.

Additional images

File:Gray950.png|The cartilages of the larynx. Posterior view. File:Gray959.png|Muscles of larynx. Side view. Right lamina of thyroid cartilage removed. File:Slide6kkkk.JPG|Aryepiglotic muscle File:Gray960.png|Muscles of the larynx, seen from above. File:Gray1028.png|Dissection of the muscles of the palate from behind.

References

Standring, Susan. (2020). "Gray's Anatomy: The Anatomical Basis of Clinical Practice".
(October 2019). "Modified arytenoid muscle electrode recording method for neuromonitoring during thyroidectomy". [[Gland Surgery]].
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.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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