<Li> <P> Cerebral arteries seen from beneath . Anterior cerebral artery visible at centre . </P> </Li> <P> Cerebral arteries seen from beneath . Anterior cerebral artery visible at centre . </P> <Li> <P> The arterial circle and arteries of the brain . The anterior cerebral arteries (top of figure) arise from the trifurcations of the internal carotid arteries . </P> </Li> <P> The arterial circle and arteries of the brain . The anterior cerebral arteries (top of figure) arise from the trifurcations of the internal carotid arteries . </P>

A1 segment of the left anterior cerebral artery