Vascularization of the brain in guinea pig. V. Angioarchitectonics of the thalamus, telencephalon and internal capsule.

The main blood supply of the thalamus constitute internal branches of the posterior cerebral, posterior communicating, middle, and choroid arteries. Branches of these arteries from three groups of vessels: medial, lateral, and posterior. Considering the number of vessels, their diameter and direct origin from the cerebral arterial circle, the thalamus is best vascularized structure of the brain. The telencephalon is supplied by rami of the anterior and middle cerebral, choroid, posterior communicating, and posterior cerebral arteries. The internal capsule and telencephalic nuclei are supplied by the internal branches of the same vessels as the telencephalon as well as by the cortical rami of the middle and posterior cerebral arteries. All these vessels from anteromedial, anterolateral, and superolateral groups. Between the internal and cortical branches anastomotic vessels are seen.