Lateral_cricoarytenoid_muscle

Lateral cricoarytenoid muscle

Lateral cricoarytenoid muscle

Add article description

The lateral cricoarytenoid (also anterior cricoarytenoid) is an intrinsic muscle of the larynx. It attaches at the cricoid cartilage anteriorly, and at the arytenoid cartilage of the same side posteriorly. It is innervated by the recurrent laryngeal nerve. It acts to close the rima glottidis, thus closing the airway.

Quick Facts Details, Origin ...

Anatomy

The muscle is directed obliquely superoposteriorly from its anterior attachment to its posterior attachment.[1]

Attachments

The muscle's anterior attachment is onto the superior border of the arch of the cricoid cartilage.[1]

Its posterior attachment is onto the anterior aspect of the muscular process of the ipsilateral arytenoid cartilage.[2]

Innervation

The muscle receives motor innervation from (branches of the anterior terminal division of) the recurrent laryngeal nerve[3] (which is in turn a branch of a vagus nerve (CN X)).

Actions/movements

The muscle rotates the arytenoid cartilage medially (it thus acts as antagonist to the posterior cricoarytenoid muscle which rotates the cartilage laterally).[1]

Function

The muscle closes the rima glottidis, adducting (approximating) the apices of the vocal process to close the ligamentous part of rima glottidis (in which it is synergystic with the oblique arytenoid muscles and transverse arytenoid muscle).[1] It thus functions to close the airway.[citation needed]

It also shortens and slackens the vocal cords.[1]

Additional images

  • Muscles of the larynx, seen from above.

See also

References

  1. [1]
    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)
  2. [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)
  3. [3]
    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)


Stub icon

This muscle article is a stub. You can help Wikipedia by expanding it.
Share this article:

This article uses material from the Wikipedia article Lateral_cricoarytenoid_muscle, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.