Nasal Part Of The Frontal Bone

Description

Nasal part of the frontal bone occupies the midline of the anterior skull, wedged inferior to the frontal squama and medial to the paired supraorbital margins. Along its inferior border, the serrated frontonasal suture meets the nasal bones, while the nasal spine projects inferomedially toward the root of the nasal septum. Immediately posterior to this region lies the ethmoidal notch of the frontal bone, a U-shaped gap that receives the cribriform plate and perpendicular plate of the ethmoid, positioning the anterior cranial fossa superior to the nasal cavity. A tight junction. Fracture lines through the nasofrontal region often extend into the nasoethmoidal complex, where disruption of the frontonasal suture and adjacent ethmoidal articulation can contribute to telecanthus, loss of dorsal nasal support, and cerebrospinal fluid rhinorrhea when the cribriform plate is involved. For endoscopic sinus surgeons and craniofacial teams, the fixed anterior perspective helps orient the surgeon to the bony landmarks that define the frontal recess, including the relationship of the frontal bone’s nasal part to the ethmoidal notch and the superior attachment zone of the nasal septum. Surface irregularity is not cosmetic here, it predicts suture lines and potential fracture propagation. Use this illustration in gross anatomy and osteology teaching to anchor discussions of the frontal bone’s midline sutures, ethmoid articulation, and anterior cranial fossa boundaries, or in radiology and maxillofacial texts when correlating CT findings of nasoethmoidal fractures with external bony landmarks. It also suits operative planning documents for nasofrontal duct and frontal sinus outflow procedures when a concise bony overview is needed. Anatomical accuracy verified by SciePro's Medical Advisory Board.