Anatomical Characteristics Of The Frontal Bone's Frontal Notch

Description

Supraorbital notch (incisura supraorbitalis) on the frontal bone sits along the superior orbital margin, typically at the junction of the medial and middle thirds of the orbital rim, just lateral to the glabella and superior to the orbit. From an anterior cranial perspective, the notch appears as a shallow indentation interrupting the otherwise smooth arc of the supraorbital margin, with the frontal squama superiorly and the orbital plate sloping posteriorly into the roof of the eye socket. Medial to the notch, the surface trends toward the frontonasal region, while laterally it continues toward the zygomatic process of the frontal bone. Small. Distinct. Clinical relevance centers on the neurovascular structures that traverse this landmark: the supraorbital nerve (from the frontal nerve, ophthalmic division of CN V) and accompanying artery and vein exit the orbit at the notch or, in some individuals, a fully ossified supraorbital foramen. That anatomic variation matters when you place a supraorbital nerve block for forehead and scalp procedures, and it also explains why patients can have persistent dysesthesia after brow lacerations or blunt trauma along the superior orbital rim. The fixed, close-range view clarifies the notch’s relationship to the orbital margin and the palpable rim used in emergency assessment of orbital fractures, as well as preoperative planning for bicoronal approaches, endoscopic brow lift portals, and frontal craniotomy burr-hole placement where neurovascular preservation reduces postoperative numbness. Use this illustration in gross anatomy and head and neck courses to teach surface anatomy landmarks of the anterior cranium, and in surgical, dental, and anesthesia texts covering regional blocks of the forehead, scalp laceration repair, and orbital rim trauma. It also suits patient-facing diagrams that need a precise bony reference for supraorbital nerve pain syndromes and periorbital injection planning. Anatomical accuracy verified by SciePro's Medical Advisory Board.