The arytenoid cartilages, which consist mainly of hyaline
cartilage, are a pair of three-sided pyramids that rest on the upper
border of the lamina of the cricoid
cartilage. The apex of each is directed upward, and curves backward
and medially, and supports the corniculate
cartilage. The base articulates with the upper border of the cricoid
lamina. The posterolateral angle of the base is thick and projecting, and
is called the muscular process because the cricoarytenoid muscles are inserted
into it. The anterior angle of the base is prolonged forwards as a pointed
spine called the vocal process because the vocal
ligament is attached to its tip.
|Posterior aspect of cartilages and
ligaments of the larynx
The surfaces of the cartilage are medial, posterior, and anterolateral.
The medial surface is narrow, vertical and even, and is clothed with mucous
membrane. The posterior surface is concave, and gives attachment to the
arytenoideus transversus. The anterolateral surface is the most extensive
of the three, and is uneven for the attachment of the thyroarytenoid and
vocalis muscles and the vestibular ligament.