It consists of the right and left temporal, ethmoid and sphenoid. These bones are demonstrated with a submentovertex (full basal) projection of the skull radiograph.
The submentovertex or the full basal projection of the skull is used best to demonstrate the base of the skull or the base of cranium. In this method, the x-rays' direction is starting from under the chin and exiting at the vertex or the top of the skull.
