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PIMA BIO130
CHP8 Skeletal; Cranial Bones and Their Markings; Frontal
| Question | Answer |
|---|---|
| Frontal | Forehead bone; also forms most of the roof of the orbits (eye sockets) and the anterior part of the cranial floor |
| Supraorbital Margin | Arched ridge just below the eyebrow; forms the upper edge of the orbit |
| Frontal Sinuses | Cavities inside the bone just above supraorbital margin; lined with mucosa; contain air |
| Frontal tuberosities (tubers or eminences) | Bulge above each orbit; most prominent part of forehead |
| Superciliary arches (ridges) | Curved ridges caused by projection of the frontal sinuses; eyebrows lie superficial to these ridges |
| Supraorbital foramen (sometimes notch) | Foramen or notch in the supraorbital margin slightly medial to its midpoint; transmits supraorbital nerve and blood vessels |
| Glabella | Smooth area between the superciliary ridges and above the nose |