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Arterial circle of a great brain

Arterial circle of a great brain [circulus arteriosus cerebri – PNA (The anatomic nomenclature Parisian), JNA (The anatomic nomenclature Yenskaya); circulus arteriosus – BNA (The anatomic nomenclature Basel); synonyms: виллизиев a circle, an arterial polygon, виллизиев a polygon] – a vascular ring which is formed by internal carotid, back and front brain arteries, and also back and front connecting arteries. The arterial circle of a great brain provides blood supply of a brain against the background of disturbances of inflow of blood on certain highways.

 
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In the aspiration to pull out the patient, doctors often go too far. So, for example, a certain Charles Janszen during the period from 1954 to 1994 endured more than 900 operations on removal of new growths.