Circle of Willis

This circle of anastomosing arterial vessels is extremely variable.

Stehbens regards a normal circle of Willis to be one in which there is a complete anastomotic polygon, which may show considerable variability not only of its components but also its branches. The so-called normal or textbook description holds true in about 34.5% of cases based on a composit review of 1413 brains. Not even Willis's original illustration conforms to the usual textbook description.

See illustrations for Circle variations.

Riferimenti dell’opera originale

Elenco riportato come compare nella fonte, senza normalizzazione dei formati bibliografici.

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