Frontal Bone

The frontal bone forms the anterior roof of the skull, the forehead, the roof of the nasal cavity and the superior arch of the orbits containing the eyeballs. The prominent bony ridge over the orbit (the eyebrows) is known as the supraorbital margin. Foramina along this ridge called supraorbital foramina, allow passage of small nerves and vessels. The frontal bone also contains a frontal sinus, which connects the nasal cavity, which acts as a sound chamber for voice resonance