Anterior surface of the sphenoid bone
A moth spreading its wings in the centre of your skull.
It is situated about 3 cm. behind, and a little above the level of the zygomatic process of the temporal bone.
It marks the junction between four bones:
The pterion receives its name from the Greek root pteron, meaning wing.
In Greek mythology, Hermes, messenger of the gods, was enabled to fly by winged sandals, and wings on his head, which were attached at the pterion.