The frontal bone is the cranial bone that extends from the superior border of the orbits to the coronal suture. As it makes up the upper 1/3 or the face it articulates with a number of facial bones. This bone contains a paranasal sinus.
Markings – The superciliary arch is a thickened area extending superiorly from the supra-orbital margin to help protect the eye There is also a pair of rounded protrusions in the bone above the brow lines each known as a frontal eminence. They vary in size by the individual and are generally more prominent in males.
Openings – There is small notch in the margin of each orbit with an associated opening to allow nerves and blood vessels passage. These are known as the supraorbital foramina or notches.