10. Brain Blood Supply
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- Category: 2- Anatomy
- Published on 11 January 2014
- Written by Ben Brahim Mohammed
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All arterial supply [ 41 ] of the brain is dependent on two arterial systems: both internal carotid arteries [ 85 , 86 ] forward, and two vertebral arteries [ 86 , 87 ] or vertebrobasilar system [ 88 , 89 , 90 ] back.
These four areas are interconnected multistage including the base of the brain by the circle of Willis [ 86 , 91 ]. This anastomotic circle works as a security system, if one of the axes shows deficient blood supply other compensates for this deficiency.
This anastomotic circle born major cerebral arteries. 
Internal carotid provide two essential parts: the anterior cerebral [ 2 ] which vascularized the inner part of the cerebral hemisphere and the average brain [ 2 ] which vascularized the lateralized part of the hemisphere.
The two vertebral arteries form a common trunk (The basilar artery [ 2 ]) that will deliver the arteries to the brainstem and cerebellum. It divide after forming the two posterior cerebral arteries [ 51 ], for the occipital lobe and the ventral part of the temporal lobe. 