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
TA A06.2.08.012
FMA 46582

Anatomical terms of muscle

The arytenoid /ærˈtnɔɪd/ is a single muscle, filling up the posterior concave surfaces of the arytenoid cartilages.

It arises from the posterior surface and lateral border of one arytenoid cartilage, and is inserted into the corresponding parts of the opposite cartilage.

It consists of oblique and transverse parts.

Action

The Arytœnoideus approximates the arytenoid cartilages, and thus closes the opening of the glottis, especially at its back part to eliminate the posterior commissure of the vocal folds.

Additional images

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

This article is issued from Wikipedia - version of the 4/18/2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.