In contrast to the superficial veins, deep veins are more constant in their organization. Most of the deep veins eventually drain into the great cerebral vein (of Galen) before entering the dural venous sinuses (eFig. 9.27). Traveling adjacent to the ACA and MCA are the anterior cerebral vein and deep middle cerebral vein. These deep veins join to form the basal vein (of Rosenthal), which continues around the lateral aspect of the midbrain. Formed at the interventricular foramen by the joining of the septal and thalamostriate veins bilaterally are the internal cerebral veins (eFig. 9.27). Posterior to the midbrain, the internal cerebral veins and basal veins join to form the great cerebral vein (of Galen) (eFig. 9.27). From here the great cerebral vein joins the inferior sagittal sinus to form the straight sinus.