19 3 / 2012

Two different patterns of the Circle of Willis
The circle of Willis receives all the blood that is pumped up the two internal carotid arteries that come up the front of the neck and that is pumped from the basilar artery formed by the union of the two vertebral arteries that come up the back of the neck, all the principal arteries that supply cerebral hemispheres of the brain branch off from the circle of Willis.
The circle of Willis is often not complete; maximally, only a third of people enjoy a complete circle of Willis, this is of importance in the event that one of the major arteries; an internal carotid or vertebral artery supplying the circle of Willis is occluded, he presence of a complete circle of Willis permits a continuing supply of blood to the entire brain and helps avert a stroke

Two different patterns of the Circle of Willis

The circle of Willis receives all the blood that is pumped up the two internal carotid arteries that come up the front of the neck and that is pumped from the basilar artery formed by the union of the two vertebral arteries that come up the back of the neck, all the principal arteries that supply cerebral hemispheres of the brain branch off from the circle of Willis.

The circle of Willis is often not complete; maximally, only a third of people enjoy a complete circle of Willis, this is of importance in the event that one of the major arteries; an internal carotid or vertebral artery supplying the circle of Willis is occluded, he presence of a complete circle of Willis permits a continuing supply of blood to the entire brain and helps avert a stroke

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    the circle of willis is not often complete :o
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  18. rori5000 reblogged this from scinerds and added:
    There’s another circle of Willis that I know of.
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