Lenticulostriate Artery (Skull), Superior View

Description

Oriented to a superior view within the cranial cavity, the illustration centers on the lenticulostriate arteries arising from the M1 segment of the middle cerebral artery, just lateral to the optic chiasm and anterior perforated substance. These small perforators course superiorly and posteriorly, diving deep into the basal ganglia and internal capsule, medial to the insular cortex and lateral to the caudate nucleus region. Bilaterally, the internal carotid arteries and proximal anterior and middle cerebral arteries form the parent trunks from which these arterioles branch, framed by the bony margins of the skull base and adjacent foramina. Deep perforators. No redundancy. Attention to this superior intradural perspective matters because the lenticulostriate territory is where millimeter scale vessel disease causes outsized disability. Chronic hypertension and lipohyalinosis commonly produce lacunar infarcts in the posterior limb of the internal capsule, while Charcot-Bouchard microaneurysms along these perforators underlie many primary intracerebral hemorrhages centered in the putamen. For neurointervention and aneurysm surgery, the relationship of M1 perforators to the anterior perforated substance and proximal MCA bifurcation guides clip placement and informs the risk of postoperative capsular stroke. Educators can drop this figure straight into neuroanatomy, stroke neurology, and neurosurgical skull base modules to teach perforator origin, direction of travel, and deep supply zones in a way that cross section imaging often obscures. It also supports figure panels for papers and textbooks discussing lacunar syndromes, basal ganglia hemorrhage patterns on CT, and surgical or endovascular planning around the proximal middle cerebral artery. Anatomical accuracy verified by SciePro's Medical Advisory Board.