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The parietal foramina are inconstant foramina on each side of the posterior aspect of the parietal bone near the sagittal suture and represent a normal anatomic variant. They transmit emissary veins, draining to the superior sagittal sinus, and occasionally a branch of the occipital artery. The foramina are variably-present, and often absent 3. When both parietal foramina are present, the point along the sagittal suture that is intersected by an imaginary line connecting the two parietal foramina is called the obelion.