Table 3: Summary of some anatomical studies of the RAH in the last 10 years.

Number of 
hemispheres
Origin Double RAH 
(%)
Mean diameter 
(mm)
A2
(%)
ACA-ACoA
(%)
A1 
(%)

Avci et al. (2003) [13]626429822.60.45
Loukas et al. (2006) [2]6923.362.314.3170.8
Tao et al. (2006) [9]9046.0946.887.0332.20.64
Uzün et al. (2009) [16]10814.679.26.20.67
Present study (2013)36647.8143.43.556.280.6