<prompt> Two internal cerebral veins fuse to formMiddle cerebral veinAnterior cerebral veinGreat cerebral veinInferior cerebral vein  <response>: The two internal cerebral veins unite together beneath the splenium of corpus callosum to form the great cerebral veinof 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 lobeRef: Vishram Singh textbook of clinical neuroanatomy second edition pg-181 