Parietal Margin Of The Greater Wing Of The Sphenoid, Posterior View

Description

Parietal margin of the greater wing of the sphenoid forms a thick, serrated superior border that meets the parietal bone along the sphenoparietal suture. From a posterior viewpoint, the margin sits superior to the broad lateral surface of the greater wing and lies posterolateral to the body of the sphenoid, framing the transition toward the temporal and parietal regions of the cranial vault. The jagged contour contrasts with the smoother adjacent plates, and its irregularities reflect interdigitating sutural anatomy rather than a free edge. Bone only. At the pterion, the sphenoparietal relationship becomes clinically tangible because the greater wing approximates the frontal and temporal bones and overlies the anterior division of the middle meningeal artery, a common source of epidural hematoma after lateral skull impact. This fixed posterior perspective emphasizes the true thickness and tooth-like serrations of the parietal margin, which helps when teaching why sutures resist shear but can still separate in pediatric head trauma or in high-energy fractures that propagate across the greater wing. In surgical planning for cranio-orbital or frontotemporal approaches, appreciating this border clarifies where osteotomies will encounter dense sphenoid bone near the cranial vault rather than the thinner squamous temporal bone. Neurosurgery and head and neck anatomy curricula can pair this illustration with lessons on cranial sutures, the pterion, and fracture lines involving the sphenoid, and medical publishers can use it as a focused plate when labeling the sphenoparietal suture in osteology or emergency medicine references. Anatomical accuracy verified by SciePro's Medical Advisory Board.