Nasal Part Of The Frontal Bone, Lateral View

Description

Frontal bone anatomy at the nasofrontal region is isolated in a lateral skull perspective, centering on the nasal part (pars nasalis ossis frontalis) as it projects inferiorly toward the root of the nose. Along its inferior margin, the frontonasal suture line with the nasal bones lies anteriorly, while the ethmoidal notch (incisura ethmoidalis) forms a posterior concavity for the cribriform plate and perpendicular plate of the ethmoid. The same contour contributes superiorly to the glabella and nasion landmarks and, laterally, blends into the supraorbital margin where the frontal bone forms the roof of the orbit. Bone edges are crisp. This region matters because small changes in the nasal part of the frontal bone alter three clinically busy boundaries at once: the anterior cranial base, the superior orbital aperture, and the nasofrontal junction where fractures can extend into the frontal sinus outflow pathway. The lateral viewpoint emphasizes the anterior to posterior relationship between the nasion and the ethmoidal notch, a relationship that helps explain why frontonasal trauma may be associated with cerebrospinal fluid rhinorrhea when the adjacent cribriform plate region is involved. Fine surface relief supports teaching of palpable landmarks and suture orientation without visual clutter from the contralateral side. Use this illustration for head and neck anatomy labs, radiology correlation figures (CT bone window orientation discussions), and operative overviews for frontal sinus and anterior cranial fossa approaches where surgeons reference the nasofrontal junction and orbital roof as fixed landmarks. It also suits medical-legal or patient-education graphics describing frontonasal fracture lines and the proximity of the ethmoid complex. Anatomical accuracy verified by SciePro's Medical Advisory Board.