Blood Distribution Cerebral Circulation
Cerebral circulation originates from carotid and vertebral arteries.
Anterior, middle, and posterior cerebral arteries are joined together by communicating arteries which for the circle of Willis.
Venous drainage occurs through cerebral veins into dural sinuses.
Cerebral veins have no valves therefore intracranial pressure can be affected by central venous pressure.
Two sinuses are of particular importance: superior saggital sinus and cavernous sinus.