The brain of rabbit receives its arterial blood from the internal carotid and basilar arteries. The internal carotid artery is well developed and bifurcates into the rostral cerebral and caudal communicating arteries which are responsible for the vasculature of the Prosen- and Mesencephalon. The basilar artery is also well developed and vasculrises the cerebellum, pons, medulla oblongata and the caudal colliculi. The basilar artery divides in rabbit into the two large rostral cerebellar arteries which join the rather smaller caudal communicating arteries to complete the caudolateral part of the cerebral arterial circle. The middle cerebral artery is a branch from the rostral cerebral, while the caudal cerebral is detached from the caudal communicating artery.
The main cerebral arteries anastomose with each other through their cortical branches, the same occured also between the cerebellar arteries.