A parietal foramen is an opening in the skull for the parietal emissary vein, which drains into the

superior sagittal sinus The superior sagittal sinus (also known as the superior longitudinal sinus), within the human head, is an unpaired area along the attached margin of the falx cerebri. It allows blood to drain from the lateral aspects of anterior cerebral hemispher ...

. Occasionally, a small branch of the

occipital artery The occipital artery arises from the external carotid artery opposite the facial artery. Its path is below the posterior belly of digastric to the occipital region. This artery supplies blood to the back of the scalp and sternocleidomastoid musc ...

can also pass through it. It is located at the back part of the

parietal bone The parietal bones () are two bones in the skull which, when joined at a fibrous joint, form the sides and roof of the cranium. In humans, each bone is roughly quadrilateral in form, and has two surfaces, four borders, and four angles. It is named ...

, close to the upper or sagittal border. It is not always present, and its size varies considerably. Parietal foramina tend to be symmetrical, with the same number on each side.

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Foramina of the skull {{musculoskeletal-stub

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