Fig 3 shows that the sphenoparietal type is a sutural pattern in which the sphenoid and parietal bones are in direct contact, preventing the frontal and temporal bones making contact with one another.
RESULT: Sphenoparietal type of pterion accounted 86.
DISCUSSION: In primate evolution, the anterosuperior segment of the squamous part of the temporal bone of lower primates became detached from its parent and incorporated into the posterosuperior angle of the greater wing of the sphenoid bone of humans, thereby changing the pterion pattern from the frontotemporal type of nonhuman primates to the sphenoparietal type of humans (9).
Sphenoparietal type of pterion is most common in all the regions.
79% which was mostly associated with sphenoparietal type (10,17).