The deep penetrating branches are called the lateral lenticulostriate arteries. The cortical branches of the MCA (depicted in red in the diagrams) supply the lateral surface of the hemisphere, except for the medial part of the frontal and the parietal lobe, which is supplied by the ACA, and the inferior part of the temporal lobe, which is supplied by the PCA. Heubner's artery is the largest of the medial lenticulostriate arteries and supplies the anteromedial part of the head of the caudate and anterior inferior internal capsule. They supply the anterior inferior parts of the basal nuclei and the anterior limb of the internal capsule.

It may be divided into 2 or 3 segments, depending on the author.Ī1 segment: from origin to anterior communicating artery and gives rise to medial lenticulostriate arteries (inferior parts of the head of the caudate and the anterior limb of the internal capsule)Ī2 segment: from anterior communicating artery to bifurcation in pericallosal artery and callosomarginal arteryĪ3 segment: major branches, excluding terminal branches, which supply the medial portions of frontal lobes, superior medial part of parietal lobes, anterior part of the corpus callosumīranches of the A1 segment of the anterior cerebral artery. The anterior cerebral artery (depicted in yellow on the diagrams) is a terminal branch of the internal carotid artery. Posterior inferior cerebellar artery (PICA) The intracranial circulation can be conveniently divided into anterior and posterior circulation, on the basis of internal carotid artery and vertebral artery supply respectively.Īnterior inferior cerebellar artery (AICA)

Divisions of pica artery