Table 1: Dimensions of transverse foramina of C3–C6 vertebrae.

DimensionRange (mm)Mean (mm) ± S.D.

Transverse diameter
 Right2.00–8.655.69 ± 1.04
 Left2.62–7.895.87 ± 0.89
Anteroposterior diameter
 Right2.19–7.215.17 ± 0.89
 Left2.51–6.815.13 ± 0.79
Mean diameter
 Right2.54–7.795.55 ± 0.87
 Left2.65–7.355.48 ± 0.77
Distance from medial border of uncinate process to transverse foramen
 Right3.5–7.95.0 ± 0.87
 Left3.2–7.75.0 ± 1.0