Arytenoid muscle

From Wikipedia, the free encyclopedia

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.)
Latin	Arytænoideus
Gray's	subject #236 1082
Origin:	Arytenoid cartilage on one side
Insertion:	Arytenoid cartilage on opposite side
Artery:
Nerve:	recurrent laryngeal branch of the vagus
Action:

The Arytenoid 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.

• The Arytænoideus obliquus, the more superficial, forms two fasciculi, which pass from the base of one cartilage to the apex of the opposite one, and therefore cross each other like the limbs of the letter X; a few fibers are continued around the lateral margin of the cartilage, and are prolonged into the aryepiglottic fold; they are sometimes described as a separate muscle, the Aryepiglotticus.

• The Arytænoideus transversus crosses transversely between the two cartilages.

[edit] Action

The Arytœnoideus approximates the arytenoid cartilages, and thus closes the opening of the glottis, especially at its back part.

[edit] Additional images

The cartilages of the larynx. Posterior view.

Muscles of larynx. Side view. Right lamina of thyroid cartilage removed.

Muscles of the larynx, seen from above.

Dissection of the muscles of the palate from behind.

[edit] External links

• Oblique arytenoid
  • LUC oary
  • Dorlands/Elsevier m_22/12548427
  • GPnotebook -1523253168
  • Norman/Georgetown lesson11 (larynxmuscles)

• Aryepiglotticus
  • LUC ary
  • Dorlands/Elsevier p_07/12616305
  • GPnotebook -898957235
  • Dictionary at eMedicine aryepiglottic+muscle

• Tranverse arytenoid
  • LUC tary
  • Dorlands/Elsevier m_22/12548436

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.