Table 1.
Minimal distance (mm) between lateral/intermediate and medial branches of lumbar dorsal ramus.
| SP 1 | SP 2 | SP 3 | SP 4 | SP 5 | SP 6 | SP 7 | SP 8 | SP 9 | SP 10 | SP 11 | SP 12 | SP 13 | SP 14 | SP 15 | SP 16 | SP 17 | SP 18 | Mean ± SD | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Anterior quarter of lateral neck of SAP | 1.2 ± 1.8 | ||||||||||||||||||
| L1 | X | X | X | 2.6 | X | X | X | X | 0.8 | 3.3 | X | X | 0.1 | X | 0.7 | 0.5 | X | 2.8 | 0.6 ± 1.1 |
| L2 | X | 1.7 | 1.7 | 3.7 | X | X | X | X | X | 1.0 | X | X | X | 2.5 | 1.5 | X | 0.2 | 3.8 | 0.9 ± 1.3 |
| L3 | X | 1.7 | 1.8 | 0.9 | 0.4 | X | X | X | X | 2.1 | X | 1.9 | 1.2 | 1.2 | 2.7 | X | 1.8 | 1.4 | 1.4 ± 0.9 |
| L4 | X | 0.8 | X | 1.9 | 11.6 | X | 2.3 | X | X | X | 1.8 | 1.5 | 1.6 | X | X | X | X | 1.5 | 1.3 ± 2.7 |
| L5 | 2.3 | X | X | 0.8 | 4.5 | 0.9 | x | 6.5 | X | X | 0.6 | 7.2 | 1.4 | 3.0 | 3.1 | X | 0.9 | 3.8 | 2.0 ± 2.3 |
| Midpoint of lateral neck of SAP | 3.2 ± 2.5 | ||||||||||||||||||
| L1 | 1.3 | 2.4 | 2.3 | 5.4 | 2.6 | 2.2 | 0.6 | 0.9 | 3.2 | 4.9 | 2.2 | 2.2 | 2.8 | 1.0 | 3.8 | 3.9 | 2.7 | 7.9 | 2.9 ± 1.8 |
| L2 | 2.7 | 4.0 | 5.1 | 5.8 | 1.4 | 1.0 | 0.5 | 0.5 | 2.3 | 3.4 | 0.8 | 1.8 | 2.5 | 3.1 | 4.5 | 1.8 | 4.4 | 5.7 | 2.9 ± 1.7 |
| L3 | 4.4 | 3.3 | 5.1 | 3.9 | 2.3 | 0.6 | 1.5 | 0.7 | 1.6 | 6.1 | 2.9 | 3.2 | 2.3 | 3.3 | 7.4 | 2.6 | 6.6 | 4.9 | 3.5 ± 2.0 |
| L4 | X | 2.4 | 2.8 | 2.6 | 15.9 | 1.3 | 3.6 | 1.3 | X | 0.8 | 2.2 | 6.9 | 7.0 | 1.4 | 3.1 | 1.0 | 1.6 | 3.6 | 3.2 ± 3.7 |
| L5 | 2.0 | 2.3 | 0.6 | 0.9 | 6.3 | 0.7 | 2.5 | 10.6 | X | 1.0 | 1.4 | 8.7 | 5.0 | 4.9 | 4.1 | 1.4 | 1.4 | 4.3 | 3.2 ± 3.0 |
X, lumbar dorsal ramus has not divided; SAP, superior articular process.