Anatomical Characteristics Of The External Surface Of The Frontal Bone's Squamous Part

Description

Frontal bone anatomy dominates the anterior cranium in this illustration, focusing on the external surface of the squamous part (squama frontalis) as it forms the forehead. Frontal eminences (tubera frontalia) rise superolaterally as smooth convexities, while the superciliary arches (arcus superciliares) thicken inferiorly on either side of the midline glabella, immediately superior to the supraorbital margins. Subtle temporal lines (lineae temporales) sweep posterolaterally across the frontal squama toward the frontal process of the zygomatic bone, marking the superior limit of temporalis fascia attachment. Midline symmetry is emphasized. Surface contour on the frontal squama matters in trauma, reconstruction, and anthropologic assessment because it reflects both bone thickness patterns and the relationship to the underlying frontal sinus and anterior cranial fossa. A blow to the forehead often produces fractures that propagate toward the supraorbital rim and nasofrontal region, and appreciation of the superciliary arch and glabella helps anticipate step-offs, brow deformity, and potential involvement of the supraorbital notch or foramen where the supraorbital nerve and vessels emerge. Surgical planning for bicoronal approaches, frontal craniotomy, or brow and forehead contouring benefits from a fixed, anteriorly oriented view that keeps the frontal eminences, temporal lines, and supraorbital margins in one plane for reliable landmarking. Landmark-driven anatomy. Use this illustration in head and neck anatomy teaching, maxillofacial or neurosurgical atlases, and clinical patient-education materials addressing forehead fractures, frontal sinus injury, and brow reconstruction, where accurate surface landmarks guide both diagnosis and incision placement. Anatomical accuracy verified by SciePro's Medical Advisory Board.