Parietal Bone Showing The Parietal Foramen, Superior View

Description

Parietal bone landmarks dominate the calvarial surface in this superior view, with the parietal foramen identified as a small circular aperture near the posterior third of the bone. It lies close to the sagittal suture, typically just lateral to the midline, and in this framing sits anterior to the lambdoid suture as the occipital margin approaches posteriorly. Subtle curvature of the cranial vault helps orient the foramen relative to adjacent sutural contours. Small opening, big implications. Parietal foramina transmit emissary veins to the superior sagittal sinus and may also accommodate a parietal branch of the occipital artery, a detail that matters when planning scalp incisions or raising a posterior scalp flap. Their size and laterality vary, and enlarged parietal foramina can be a benign variant or part of congenital calvarial defects, so a precise surface landmark helps correlate anatomy with CT bone windows and surgical palpation. A superior viewpoint emphasizes the relationship to the sagittal and lambdoid sutures, which are the reference lines clinicians use when localizing the posterior midline and vertex. Use this illustration in gross anatomy and osteology teaching to anchor sutural anatomy, emissary vein pathways, and vertex surface landmarks, or in radiology and neurosurgical publishing where a labeled calvarial view supports discussions of normal variants and burr hole planning near the midline. Anatomical accuracy verified by SciePro's Medical Advisory Board.