Frontal bone
Os frontale
SkeletalSkeletonHead
- What it is
- The forehead bone: a curved squama rising from the brow ridges and supraorbital margins, plus thin orbital plates forming the roofs of both orbits; it meets the parietals at the coronal suture.
- Function
- Protects the frontal lobes, forms the forehead and orbital roofs, and contains the frontal sinuses.
- Size
- ≈ 12 cm wide, 12 cm tall; 5–7 mm thick
- Clinical note
- It forms from two halves; a persistent midline metopic suture is seen in a few percent of adults.