The main causes of acute cerebral infarction are as follows: 1. caused by atherosclerosis of large arteries, due to atherosclerosis leading to occlusion of large vessels, patients can suddenly appear some neurological deficits. 2. acute cerebral infarction can also be seen clinically in some small vascular lesions, such as lacunar cerebral infarction, which is due to small penetrating vascular lesions, patients appear some symptoms of neurological deficits, and the clinical Acute cerebral infarction can also be due to cardiogenic embolism, such as patients with atrial fibrillation or heart valve disease, which can also manifest as acute cerebral infarction with neurological deficits due to embolism of cerebral vessels caused by the formation of thrombus in the attached wall. Acute cerebral infarction can occur.