Parietal Bone, Lateral View

Description

Positioned on the superolateral calvaria, the os parietale is highlighted in isolation against the surrounding cranial vault, bounded anteriorly by the coronal suture with the frontal bone and posteriorly by the lambdoid suture with the occipital bone. Inferiorly, its squamous border meets the temporal bone at the squamosal suture, while the inferior temporal line arches anteroinferiorly across the parietal surface and marks the superior extent of the temporalis muscle attachment. The temporal region sits immediately inferior to the parietal bone, and the mandible with dentition appears anteroinferiorly as a spatial reference. Clean landmarks. Lateral parietal anatomy matters because it frames surgical and traumatic access to the supratentorial compartment, where burr holes and craniotomy flaps are planned with respect to sutures and muscle lines rather than internal neuroanatomy. Pterion-adjacent impact can lacerate the middle meningeal artery and produce an epidural hematoma, and this view helps communicate how close the parietal squama lies to the temporal fossa and the course of the temporal fascia and temporalis. For scalp lacerations and hematoma spread, the parietal region also anchors teaching of the layered anatomy from skin to pericranium. Course directors in gross anatomy, neuroanatomy, and head and neck modules can use this plate when introducing the skullcap (calvaria), cranial sutures, and temporalis attachments, or when testing surface landmarking for craniotomy planning. Publishers will also find it suitable for neurosurgery and emergency medicine texts discussing epidural hematoma mechanism, fracture patterns, and radiographic orientation on lateral skull projections. Anatomical accuracy verified by SciePro's Medical Advisory Board.