Circle of Willis
Circle of Willis
Circle of Willis (pronunciation: sɜrkl ɒv ˈwɪlɪs) is a part of the cerebral circulation system in the brain. It is named after Thomas Willis, a British physician who first described it in the 17th century.
Etymology
The term "Circle of Willis" is derived from the name of the British physician Thomas Willis (1621–1675), who was a founding member of the Royal Society and a pioneer in the field of neuroanatomy. He first described this circular arterial structure in his work Cerebri Anatome published in 1664.
Description
The Circle of Willis is a ring-like structure located at the base of the brain. It is formed by the joining of several major arteries, including the internal carotid arteries and the basilar artery. This formation allows for the equal distribution of blood to both hemispheres of the brain, and provides a means of collateral circulation in case of blockage or damage to one of the arteries.
Related Terms
- Cerebral circulation: The movement of blood through the network of blood vessels supplying the brain.
- Internal carotid artery: One of the two main arteries that supply blood to the brain.
- Basilar artery: A major blood vessel of the brain, formed by the union of the two vertebral arteries.
- Collateral circulation: An alternate pathway for blood flow that can be utilized when the primary route is obstructed or damaged.
- Neuroanatomy: The study of the structure and organization of the nervous system.
See Also
External links
- Medical encyclopedia article on Circle of Willis
- Wikipedia's article - Circle of Willis
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