Frontal Bone, Superior View

Description

Superior calvarial anatomy centers on the frontal squama anteriorly, with the glabella and nasion marking the midline transition toward the nasal bones and frontonasal suture. Laterally, the supraorbital margins sweep into the zygomatic processes of the frontal bone, framing the orbital roofs and the superolateral orbital rim. Deep to the frontal bone, the anterior cranial fossa floor comes into context at the cribriform plate region of the ethmoid, where the anterior ethmoidal artery courses from the orbit toward the roof of the nasal cavity. Relationships are the story here. Clinically, that anterior ethmoidal artery matters because it traverses a corridor shared by the anterior ethmoidal nerve and fragile skull base lamellae, a setup familiar to anyone performing endoscopic sinus surgery or repairing cerebrospinal fluid leaks at the cribriform area. Ligation or injury can complicate anterior epistaxis control and can be a source of brisk bleeding during ethmoidectomy, while fractures involving the supraorbital margin and frontal sinus outflow tract frequently alter the surgical approach to the anterior cranial base. Small vessel, big consequences. Use this asset for head and neck anatomy teaching in medical or dental curricula, for ENT and neurosurgical atlas plates discussing the anterior cranial fossa and ethmoidal arterial supply, or for radiology education when correlating CT of the frontal bone, orbital roof, and cribriform plate with operative landmarks. It also fits craniofacial trauma and sinus surgery patient education materials where clean bony references (glabella, supraorbital margin, zygomatic process) anchor orientation. Anatomical accuracy verified by SciePro's Medical Advisory Board.