Which artery is most commonly absent from the Circle of Willis?
Understand the Problem
The question is asking about the anatomy of the Circle of Willis and specifically which artery is most commonly absent in that structure. This involves some knowledge of human anatomy and vascular structures in the brain.
Answer
Posterior communicating artery.
The artery most commonly absent from the Circle of Willis is the posterior communicating artery.
Answer for screen readers
The artery most commonly absent from the Circle of Willis is the posterior communicating artery.
More Information
The Circle of Willis is a ring-like arterial structure located in the brain that supplies blood to the cerebral hemispheres. Variations in its structure are common, with the posterior communicating artery frequently being hypoplastic or absent, leading to an incomplete circle.
Tips
It's easy to confuse the posterior communicating artery with other arteries like the anterior communicating artery when describing common absences in the Circle of Willis.
Sources
- Circle of Willis: Anatomy, function, and what to know - medicalnewstoday.com
- Circle of Willis - an overview | ScienceDirect Topics - sciencedirect.com
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