Anterolateral surface of arytenoid cartilage

The antero-lateral surface is somewhat convex and rough.

On it, near the apex of the cartilage, is a rounded elevation (colliculus) from which a ridge (crista arcuata) curves at first backward and then downward and forward to the vocal process.

The lower part of this crest intervenes between two depressions or foveæ, an upper, triangular, and a lower oblong in shape; the latter gives attachment to the thyroarytenoid muscle (vocal muscle).