Left Embryonic Posterior Cerebral Artery is a congenital dysplasia that does not usually affect intelligence. Left Embryonic Posterior Cerebral Artery is caused by abnormalities in the blood vessels of the brain during the embryonic period, which may be asymptomatic or may result in insufficient blood supply to the brain, aneurysms, and so on. Most people have no obvious symptoms and the abnormality is only discovered during a physical examination. Some people may experience dizziness and headaches, but treatment is usually not required. Although there is no clear evidence that it can affect intelligence, it is only necessary to intervene if it is accompanied by cerebral ischemia, aneurysms, and other disorders. If there is a left-sided embryonic posterior cerebral artery, it is important to go to the hospital in time for examination and treatment as prescribed by the doctor.