Table 1.

Measurements of the lateral mass and the neural foramen

Distance in mm (mean + SD) mm
	Lateral mass									Foramen
	Superoinferior			Anteroposterior			Mediolateral			Height			Anteroposterior
	Mean	Min	Max	Mean	Min	Max	Mean	Min	Max	Mean	Min	Max	Mean	Min	Max
C3	11.2 ± 1.4	9	14	10.4 ± 1.3	8	12	10.3 ± 1.7	8	14	8.4 ± 0.9	7	10	4.4 ± 0.9	3	6
C4	11.3 ± 2	9	15	11.3 ± 1.7	8	13	11.3 ± 2.1	8	16	7.8 ± 1	6	9	4.1 ± 0.7	3	5.5
C5	11.2 ± 1.6	8	14	11.3 ± 0.9	10	13	11.3 ± 1.1	10	13	8.1 ± 1.3	6	10	4.7 ± 0.8	4	6
C6	11.3 ± 1.4	9	14	11 ± 1.8	8	14	12.1 ± 2.1	9	17	8.6 ± 1.2	7	11	5 ± 0.7	4	6
C7	12.3 ± 1.6	9	13	11.9 ± 1.7	10	15	12.8 ± 1.5	8	13	8.8 ± 1.1	7	11	6.2 ± 1.1	5	9