The diagram on the slide shows how the blood supply of the brain is arranged.1,3 Blood enters the cerebral blood supply from the carotid and vertebral arteries.1 These main arteries interconnect via the central structure known as the ‘Circle of Willis’.1 Within the brain, the internal carotid artery supplies the anterior of the brain via the anterior and middle cerebral arteries, and the vertebral and basilar arteries supply posterior and medial regions of the hemispheres.1
References:
1. Konan LM, Reddy V, Mesfin FB. Neuroanatomy, cerebral blood supply. [Updated 2023 Jul 24]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023. Available at: https://www.ncbi.nlm.nih.gov/books/NBK532297/.
2. Pare JR, Kahn JH. Basic neuroanatomy and stroke syndromes. Emerg Med Clin North Am 2012; 30 (3): 601–615.
3. Moos T, Møller M. Blood supply of the central nervous system. In: Basic Neuroanatomy, 1st edition, 2003.