Table 3. Different parameters of the vertebral artery in relation to the atlas vertebra.

Variable	Mean (mm)	Std. Deviation	P value
Total length of the V2-segment b/w C2-C1 (R)	10.910	2.1810	.011
Total length of the V2-segment b/w C2-C1 (L)	12.200	1.8625
Distance of the lateral edge of the C2 ganglion from the vertebral artery (R)	8.8320	2.75722	.095
Distance of the lateral edge of the C2 ganglion from the vertebral artery (L)	9.3860	3.41105
Distance of the artery from the lateral end of the dural tube (R)	14.2250	3.08808	.289
Distance of the artery from the lateral end of the dural tube (L)	13.63	2.415
Percentage (R)	50.271	18.7433	.551
Percentage (L)	51.69	19.329