Two internal cerebral veins fuse to form
Middle cerebral vein
Anterior cerebral vein
Great cerebral vein
Inferior cerebral vein
The two internal cerebral veins unite together beneath the splenium of corpus callosum to form the great cerebral vein(of GALEN).*After a sho backward course, it joins the Inferior sagittal sinus to form the straight sinus.The tributaries are :Internal cerebral veinsBasal veinsVeins from colliculiVeins from cerebellum and adjoining pas of occipital lobe(Ref: Vishram Singh textbook of clinical neuroanatomy second edition pg-181)
Brain 