Constitutes, one on hay. and one on the left. side, anterior end branches of the basal artery . Supplies the inside of the temporal lobe and occipital lobe .
Is part of the arterial circle of the brain.
The two posterior cerebral arteries, one on the right and one on the left side, emit where they start from the basal artery and together with this the posterior central/perforating cerebral arteries. These enter the upper part of the brainstem through the posterior blood vessel inlet.