Frontal Bone In Lateral View Showing The External Surface Of The Its Squamous Portion

Description

Frontal bone anatomy dominates this lateral skull view, with the external surface of the squamous portion forming the anterior cranial wall of the calvaria and sweeping superiorly toward the vertex. Laterally, the squama meets the parietal bone along the coronal suture, while inferiorly it approaches the supraorbital margin and the frontozygomatic region at the superolateral orbit. Subtle surface relief can include the frontal eminence superiorly and the superciliary arch over the orbit, with the temporal line curving posterolaterally to mark the attachment of temporalis fascia and the boundary between frontal and temporal surfaces. Key landmarks sit close together. Clinical relevance hinges on how these external contours and sutural boundaries guide both trauma assessment and surgical planning. Frontal bone fractures commonly involve the supraorbital rim and frontozygomatic suture line, and appreciating the lateral relationship between the squamous frontal surface and the superior orbital margin helps orient the likely course of the supraorbital neurovascular bundle as it emerges at the supraorbital notch or foramen near the orbital roof. For anterior cranial approaches, the external squama provides a practical map to estimate the thickness of the frontal bone and the location of burr-hole placement relative to the coronal suture and temporal line, while keeping the frontal sinus region in mind even when the sinus itself is not externally visible. Use this illustration for osteology teaching in medical, dental, and PA anatomy curricula, where students must identify cranial sutures and frontal surface landmarks from a lateral perspective. It also fits neurosurgical and maxillofacial texts discussing frontal craniotomy planning, supraorbital rim fixation, and forensic documentation of cranial trauma patterns. Anatomical accuracy verified by SciePro's Medical Advisory Board.