Table 2 Relationship of lumbar nerve and transverse process (, mm)

L2

L3

L4

L5

Superior margin of TP to nerve

4.9 ± 0.5

(3.6-5.3)

5.3 ± 0.8

(3.8-6.1)

5.9 ± 1.2

(3.6-7.9)

5.2 ± 0.7

(3.8-7.8)

Inferior margin of TP to nerve

8.9 ± 1.0

(7.1-10.9)

7.8 ± 1.1

(5.3-9.4)

6.8 ± 0.9

(4.9-8.4)

6.2 ± 0.9

(4.8-8.4)

Medial edge of vertebral to nerve on superior margin of TP

5.2 ± 1.2

(3.5-7.9)

5.0 ± 1.2

(3.1-7.6)

5.6 ± 1.3

(3.2-8.9)

8.7 ± 1.3

(5.4-11.6)