Anatomy Guide › Head & neck
Frontal Bone
The frontal bone forms your forehead and the upper rim of both eye sockets. Touch the space just above your eyebrows and you are resting your fingers on it. In a newborn it actually starts as two halves joined by a seam called the metopic suture; in most people the halves fuse into a single plate within the first couple of years of life.
Beyond giving the face its shape, the frontal bone does serious protective work. It forms the front wall of the cranial vault, shielding the frontal lobes of the brain — the region most involved in planning, judgment, and personality. Its lower portion arches over the eyes as the supraorbital margins, the bony ridges you can feel under each eyebrow. A small notch or hole in each ridge, the supraorbital foramen, lets nerves and vessels pass through to the skin of the forehead, which is why a firm press there can feel oddly electric.
Hidden inside the bone, just above the nose, are the frontal sinuses — air-filled chambers lined with mucous membrane. They lighten the skull and add resonance to the voice, but they are also the spot that aches during a bad head cold. Sinus pressure headaches centered above the eyes are frontal-sinus complaints.
In Anamo, the frontal bone is a friendly early guess when the mystery part sits in the head region: it is large, midline, and close to many other skull bones, so even a miss tends to paint a warm color and point you toward the answer. Its borders meet the parietal bones at the coronal suture, a boundary worth knowing for follow-up guesses.
- Forms the forehead and the roofs of both orbits (eye sockets)
- Begins as two separate halves that usually fuse by age two
- Contains the frontal sinuses, the site of many sinus headaches
- Meets the parietal bones at the coronal suture
Think you could find the frontal bone on a 3D model? Play Anamo and test yourself — every guess is color-coded by how close it lands to the mystery structure.