Uploaded June 2025 | Updated September 2026, 2 hours ago

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Is it really a Circle of Willis? Or is it the "Polygon of Willis"?

Join me to explore the anatomy, terminology, and significance of this vital arterial circle at the base of the brain - both from a diagrammatic, theoretical and a practical point of view

In this video, we’ll:
✅ Examine the classic configuration of the Circle of Willis
✅ Understand its components: ACA, ACoA, ICA, PCA, PCoA
✅ Discuss why calling it a polygon may not be accurate
✅ Visualize the structure using diagrams and simplified explanations

0:00 Intro and Drawing the circle
6:34 Defining the polygon
8:00 Revise
9:20 Circle of Willis on the brain
10:20 Specimen photograph to wrap up