Research Article
Anatomical Variations of the Circulus Arteriosus in Cadaveric Human Brains
Table 7
Comparison of morphological variations of A1.
| | Variation type | Present study | Al-Hussain et al. [29] | Riggs and Rupp [14] | Piganiol et al. [30] | Macchi et al. [31] |
| | Absent | 2.66 | 2 | — | 2.1 | — | | Hypoplastic | 5.33 | 8 | 7 | — | 0.7 | | Duplication | 6 | 10 | — | — | — | | Symmetrical | 68.66 | — | — | — | — | | Asymmetrical | 31.33 | — | — | — | — |
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