Both cerebral insufficiency and cerebral thrombosis belong to ischemic cerebrovascular diseases, mostly related to atherosclerosis, and the difference between the two is as follows: 1. Cerebral insufficiency is mainly due to cerebral vascular spasm or cerebrovascular atherosclerosis with narrowing, which affects the blood supply to the brain, and the symptoms are relatively light. 2. Cerebral thrombosis, also called cerebral infarction, is due to cerebral atherosclerosis not only with narrowing, but also with occlusion, resulting in local brain tissue Complete ischemia and hypoxia occur, resulting in necrosis, irreversible damage to the corresponding brain function, and even sequelae, with symptoms heavier than those of cerebral blood supply deficiency.