Research Article
Anatomical Variations of the Circulus Arteriosus in Cadaveric Human Brains
Table 4
Percentages of different variations of CW.
| | Variations | Components | Number of variations | % | Total | Total percentage |
| | Aplasia | ACoA | 12 | 8 | 26 |
17.33 | | A1 | 4 | 2.66 | | PCoA | 6 | 4 | | P1 | 4 | 2.66 |
| | Hypoplasia | ACoA | 10 | 6.66 | 63 |
42 | | A1 | 3 | 7.14 | | PCoA | 41 | 27.33 | | P1 | 9 | 6 |
| | Duplication | ACoA | 16 | 10.66 | 28 |
18.66 | | A1 | 9 | 6 | | PCoA | — | — | | P1 | 3 | 2 |
| | Fenestrations | ACoA | 5 | 3.33 | 8 |
5.33 | | A1 | — | — | | PCoA | 1 | 0.66 | | P1 | 2 | 1.33 |
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