Anatomy of cerebral veins and sinous

The veins of the brain have no muscular tissue in their thin walls and possess no valves as compared to other types of veins. They emerge from the brain and lie in the subarachnoid space. They pierce the arachnoid mater and the meningeal layer of the dura and drain into the cranial venous sinuses. Blood from both brain is drained by cerebral veins into dural sinuses and then into the jugular.  Cerebral veins is divided into 3 important groups which are superfical cerebral veins, deep cerebral veins and posterior fossa veins.