The Nasal Part Of The Frontal Bone In Lateral View

Description

Arising from the inferior aspect of the frontal bone, the nasal part (pars nasalis ossis frontalis) is shown in lateral view as it descends toward the root of the nose and meets the anterior cranial base. Along its posterior margin, the ethmoidal notch (incisura ethmoidalis) is indicated where the frontal bone receives the cribriform plate and ethmoidal labyrinth of the ethmoid, while the anterior contour continues toward the frontonasal region. As the animation advances, subtle rotation clarifies how this midline projection relates superiorly to the frontal squama and inferiorly to the nasal bones and the nasion area. The orbital rim comes into context as the nasal part extends slightly into the orbital opening. This region matters whenever you need to orient fractures and surgical corridors at the naso-orbital junction. Disruption around the frontonasal suture and adjacent medial orbital rim is common in naso-orbito-ethmoid (NOE) fracture patterns, where small bony landmarks guide reduction and fixation and where proximity to the frontal sinus and anterior ethmoidal cells complicates repair. A moving lateral sequence makes the ethmoidal notch easier to conceptualize than a single plate, because you can track the notch’s posterior boundary as it frames the ethmoid and the anterior cranial fossa floor. Use it in gross anatomy and head and neck modules when teaching the anterior cranial base, nasion landmarks, and the bony limits of the medial orbit, and in maxillofacial or ENT education to support discussions of NOE trauma, frontal sinus approaches, and preoperative CT orientation in oblique reconstructions. Anatomical accuracy verified by SciePro's Medical Advisory Board.