A, Superior view. A large venous lacunae adjoining the sagittal sinus extends above the bridging veins emptying into the superior sagittal sinus. The veins from the right hemisphere emptying into the superior sagittal sinus are the anterior, middle, and posterior frontal, central, postcentral, and anterior parietal veins. The precentral and central areas are drained by the large central vein. The veins draining the posterior part of the hemisphere are directed forward. B, The large venous lacunae have been removed to show the veins passing below the lacunae to enter the superior sagittal sinus. The left central vein joins the superior sagittal sinus at the upper end of the central sulcus. The right central vein passes forward across the precentral gyrus to join the superior sagittal sinus. C, The frontal lobe is above and the occipital lobe is below. A large venous lacunae covers the central part of the cerebral vertex. D, Some of the dura covering the upper surface of another venous lacunae have been removed. Most of the veins draining into the sagittal sinus proceed medially below the lacunae to reach the sinus. E, Right lateral view of the sagittal sinus after removal of the lacunae shown in D. The veins entering the sagittal sinus pass below the large venous lacunae. The medial and lateral, frontal and parietal veins often join to form a common stem before emptying into the sagittal sinus. (Images courtesy of AL Rhoton, Jr.)