The pterygospinous ligament stretches from the upper part of the posterior border of the lateral pterygoid plate to the spinous process of the sphenoid.

It occasionally ossifies,^[1] and in such cases, between its upper border and the base of the skull, a foramen is formed - pterygospinous foramen (Civinini) which transmits the branches of the mandibular nerve to the muscles of mastication.

• Pterygoalar ligament

This article incorporates text in the public domain from page 388 of the 20th edition of Gray's Anatomy (1918)