The transverse arytenoid is an unpaired intrinsic muscle of the larynx. It is situated deep to the two oblique arytenoids; the oblique and transverse arytenoids are often considered two parts of a single muscle - the interarytenoid (arytenoid) muscle (which is then said to have an oblique part and a transverse part). The transverse arytenoid bridges the gap between the two

arytenoid cartilage The arytenoid cartilages () are a pair of small three-sided pyramids which form part of the larynx. They are the site of attachment of the vocal cords. Each is pyramidal or ladle-shaped and has three surfaces, a base, and an apex. The arytenoid ...

in the larynx, occupying the concavity of the lateral surface of each cartilage.

Anatomy

Attachments

The muscle attaches to both arytenoid cartilages, attaching onto each cartilage at the posterior aspect of its muscular process and the adjacent lateral border of the cartilage.

Innervation

The muscle receives motor innervation from the two recurrent laryngeal nerves (each being a branch of the ipsilateral vagus nerve (CN X)); the muscle also receives branches from the internal laryngeal branch, though the latter's contribution to the muscle's motor innervation is unclear.

Function

The muscle approximates the two arytenoid cartilages to close the posterior (intercartilaginous) part of

rima glottidis The rima glottidis is the opening between the two true vocal cords anteriorly, and the two arytenoid cartilages posteriorly. It is part of the larynx. Anatomy The rima glottidis is the narrowest part of larynx. It is longer (~23 mm) in ...

References

{{Reflist Muscles of the head and neck