fig5

Figure 5. (A) Azygos ACA in which single ACA feeds into medial surface of both cerebral hemisphere. ACA: anterior cerebral artery; (B) Bihemispheric ACA, in which two ACA , one is dominant with branches extending into contralateral hemisphere; (C and D) Accessory ACA in which a median artery supply either one or both hemispheres. ACA: anterior cerebral artery