Frontal Bone

Description

Presented from a left lateral cranial angle with the calvaria partially removed, the skull exposes the anterior cranial fossa and orbits while the sphenoid bone is color-highlighted to anchor orientation. The lesser wing and anterior clinoid process lie superior to the optic canal, with the greater wing extending laterally toward the zygomatic process of the frontal bone and the temporal region. Anteriorly, the frontal bone contributes the supraorbital margin and glabellar region, while the ethmoid sits medial to the orbit and anterior to the body of the sphenoid. Clean bony relationships. Clinically, this relationship set matters because the ethmoidal arteries traverse from the orbit through the frontoethmoidal suture line into the anterior cranial fossa, a corridor repeatedly encountered during functional endoscopic sinus surgery and endoscopic skull base work. The optic canal and optic strut define a no-margin zone for orbital apex decompression, transcranial approaches, and evaluation of traumatic fractures that can compromise the optic nerve or internal carotid artery via the cavernous sinus region. Surgeons and radiologists often use the frontal beak, medial orbital wall (lamina papyracea), and the sphenoid’s planum and lesser wing as reliable landmarks when correlating CT bone windows with intraoperative anatomy. Use this illustration in head and neck anatomy teaching to tie the frontal bone’s supraorbital rim and glabella to deeper sphenoid and ethmoid landmarks, or in neurosurgical and ENT publications discussing anterior skull base approaches, epistaxis sources involving the anterior and posterior ethmoidal arteries, and orbital apex pathology. It also fits well in radiology lectures on craniofacial trauma patterns and optic canal involvement. Anatomical accuracy verified by SciePro's Medical Advisory Board.