Complex sentence: The point corresponding with the posterior end of the sphenoparietal suture is named the pterion; it is situated about 3 cm. behind, and a little above the level of the zygomatic process of the frontal bone.
Split into simpler sentences: The point corresponding with the posterior end of the sphenoparietal suture is named the pterion. It is situated about 3 cm. behind, and a little above the level of the zygomatic process of the frontal bone.