Pterion is:
Is a point of articulation of four skull bones
It is a point where 'bregma' and 'lamba' meet
It is region of the postero-lateral fontanelle merge
Lies deep to the zygomatic arch
Pterion is the area in the temporal fossa where 4 bones (frontal, parietal, temporal and sphenoid) adjoin each other forming an H-shaped suture.’