Once these arteries enter the cranium, they branch exuberantly, eventually supplying blood to all deep and superficial regions of the brain. Two major sources of arterial blood provide this perfusion: the anterior circulation that originates in the internal carotid arteries and the posterior (or vertebrobasilar) circulation that originates in the vertebral arteries. Thus, it follows straightforwardly that the brain ought also to be one of the most perfused organs in the body, which, indeed, it is. This makes it the most energy-intensive organ of the human body. While the brain is 2% of the total body mass, it uses nearly 50% of the human body's glucose. The cerebral circulation and cerebrovascular disease I: Anatomy. How to cite this URL: Chandra A, Li WA, Stone CR, Geng X, Ding Y. How to cite this article: Chandra A, Li WA, Stone CR, Geng X, Ding Y. Keywords: Cerebral arteries, cerebral circulation, cerebral microcirculation, blood brain barrier, cerebral venous system, cerebrovascular anatomy, cerebrovascular disease Thus, an anatomical context is supplied for the discussion of cerebrovascular disease pathogenesis provided by our second paper. Finally, the cerebral venous system, which is composed of cerebral veins and dural venous sinuses, is described. This function, the exchange of gases and nutrients with the cerebral parenchyma, is the subject of a subsequent section on the microcirculation and blood–brain barrier. Description of the arterial system proceeds to the point of the fulfillment of its function. The systems, and the major branches that comprise them, are described. This system is partitioned into two major divisions (anterior and posterior circulations) that differ significantly in features and pathogenic potential. Beginning with its origin in the branches of the aorta, we start by describing the arterial system. In this paper, which is the first in a three-part series that reviews cerebrovascular anatomy, pathogenesis, and stroke, we lay the anatomical foundation for the rest of the series.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |