parietomastoid

In the middle line is the posterior part of the sagittal suture connecting the parietal bones; extending downward and lateralward from the hinder end of the sagittal suture is the deeply serrated lambdoidal suture joining the parietals to the occipital and continuous below with the parietomastoid and occipitomastoid sutures; it frequently contains one or more sutural bones.

II. Osteology. 5c. The Exterior of the Skull 1918

The squamosal suture arches backward from the pterion and connects the temporal squama with the lower border of the parietal: this suture is continuous behind with the short, nearly horizontal parietomastoid suture, which unites the mastoid process of the temporal with the region of the mastoid angle of the parietal.

II. Osteology. 5c. The Exterior of the Skull 1918

The point of meeting of the parietomastoid, occipitomastoid, and lambdoidal sutures is known as the asterion.

II. Osteology. 5c. The Exterior of the Skull 1918

It is formed by the dorsum sellæ and clivus of the sphenoid, the occipital, the petrous and mastoid portions of the temporals, and the mastoid angles of the parietal bones; it is crossed by the occipitomastoid and the parietomastoid sutures, and lodges the cerebellum, pons, and medulla oblongata.

II. Osteology. 5d. The Interior of the Skull 1918