Cerebral thrombosis (cerebral embolism), also known as embolic cerebral infarction. Refers to the human blood circulation in some unusual solid, liquid or gas and other embolic material, with the blood flow into the cerebral artery or supply the brain's neck artery, the vascular cavity acute occlusion, causing local cerebral blood flow interruption, resulting in local brain Tissue ischemia, hypoxia or even softening, necrosis, and therefore the emergence of acute brain dysfunction clinical manifestations. Cerebral embolism often occurs in the internal carotid artery system, vertebral - basilar artery system is relatively rare to see.