<prompt> 35-year-old woman presents to OPD with complains of headache after hitting her head accidentally with the wall while doing household chores . An MRI was ordered which confirmed presence of blood clot in the great cerebral vein of Galen. Obstructed vein is a direct tributary of which of the following venous structures?Emissary veinsPterygoid venous plexusDiploic veinsDural venous sinuses  <response>: Veins of the brain are direct tributaries of dural venous sinuses. Emissary veins connect dural venous sinuses with the veins of scalp; Pterygoid venous plexus communicates with cavernous sinus through an emissary vein; Diploic veins lie in channels in the diploe of skull and communicate with dural sinuses, veins of scalp, and meningeal veins. 