Frontal bone

Definition

The frontal bone is a large bone at the front of the skull that forms the forehead, the roofs of the orbits (eye sockets), and most of the anterior part of the cranial floor. It also contains sinuses known as frontal sinuses, which are air-filled cavities that reduce the weight of the skull and improve voice resonance.

Related terms

Sutures: Fibrous joints that connect cranial bones together, allowing for growth during infancy and rigidity in adulthood.

Orbital cavity: A bony socket in the skull housing the eyeball and its associated muscles, nerves, and blood vessels.

Sinus: A cavity within a bone or other tissue, often filled with air or fluid; in this context specifically referring to those within bones of the face and skull such as frontal sinuses