Frontal Bone's Temporal Line, Lateral View

Description

Frontal bone anatomy is centered on the temporal line, a curved osseous ridge on the lateral aspect of the squama. From a lateral view, the line arcs posterosuperiorly from the region of the zygomatic process of the frontal bone toward its continuation on the parietal bone as the superior temporal line, defining the superior boundary of the temporal fossa. Inferior to the ridge lies the concavity of the temporal fossa that accommodates the origin of temporalis, while anterior and inferior contours approach the supraorbital margin and frontozygomatic region. Bony landmarks are crisp. Surgeons and educators use the temporal line as more than a descriptive ridge on the skull and cranium, because it marks the attachment of the deep temporal fascia and helps orient the dissection planes of the temporal region where the temporalis muscle is elevated for frontotemporal (pterional) approaches. In craniofacial trauma, recognition of this contour supports pattern recognition around the lateral orbital rim and frontozygomatic area, where fractures can disrupt the continuity of the temporal line and alter the temporal fossa contour. The fixed lateral perspective clarifies the relationship between the temporal line and adjacent calvarial curvature, which is exactly what you need when teaching surface landmarks or planning incision placement relative to fascial attachments. Neuroanatomy and head and neck anatomy courses can pair this illustration with temporalis muscle origin and the fascial layers of the temporal region, and medical publishers can place it beside sections on the temporal fossa, pterion vicinity, and frontotemporal craniotomy landmarks. It also suits radiology primers that correlate palpable skull ridges with CT-based cranial anatomy. Anatomical accuracy verified by SciePro's Medical Advisory Board.