1 — Frontal notch/foramen; 2 — Zygomatic process; 3 — Supra-orbital notch/foramen; 4 — Temporal line; 5 — Temporal surface; 6 — Superciliary arch; 7 — Glabella; 8 — Frontal suture; Metopic suture; 9 — External surface; 10 — Squamous part; 11 — Parietal margin; 12 — Frontal tuber; Frontal eminence; 13 — Supra-orbital margin; 14 — Nasal part; 15 — Nasal spine; 16 — Orbital part; 17 — Impressions of cerebral gyri; 18 — Grooves for arteries; 19 — Internal surface; 20 — Groove for superior sagittal sinus; 21 — Frontal crest; 22 — Foramen caecum
