The middle cerebral artery is the major supplier of blood to the cerebral cortex. It consists of 4 principal segments, M1-M4. M1 refers to the horizontal course of the artery from its... Read more »
The anterior cerebral artery (ACA) consists of 3 major segments, designated A1-A5 . The A1 segment extends from the middle cerebral artery to the anterior communicating artery (a small artery connecting the... Read more »