The arytenoid/ærᵻˈtiːnɔɪd/ 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
The cartilages of the larynx. Posterior view.
The cartilages of the larynx. Posterior view.
Muscles of larynx. Side view. Right lamina of thyroid cartilage removed.
Muscles of larynx. Side view. Right lamina of thyroid cartilage removed.
Aryepiglotic muscle
Aryepiglotic muscle
Muscles of the larynx, seen from above.
Muscles of the larynx, seen from above.
Dissection of the muscles of the palate from behind.
Dissection of the muscles of the palate from behind.
Bottom, medial section showing the muscles within the TAF and CC ... e, Dorsal view (left) with the CC removed and associated sagittal slices (right) showing the characteristic U-shaped fused arytenoid cartilages bearing the bilateral vocalis muscle.
