It is the superior origin of the pterygomandibular raphe, and the levator veli palatini muscle.
[1] The tendon of tensor veli palatini muscle glides around it.
[1] The pterygoid hamulus is the superior origin of the pterygomandibular raphe.
[1] Rarely, the pterygoid hamulus may be enlarged, which may cause mouth pain.
[2] This article incorporates text in the public domain from page 151 of the 20th edition of Gray's Anatomy (1918)