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Measurement of distance between adjacent lumbosacral nerve foramen (mm).
| L4→L5 | L5→L6 | L6→S1 | S1→S2 | |
|---|---|---|---|---|
| intervertebral foramen diameter | 6.75 ± 0.07 | 5.65 ± 0.08 | 6.70 ± 0.12 | 5.86 ± 0.20 |
| nerve root length | 3.19 ± 0.12 | 3.67 ± 0.15 | 3.01 ± 0.22 | 4.5 ± 0.18 |
| nerve root diameter | 1.72 ± 0.11 | 1.80 ± 0.07 | 1.01 ± 0.09 | 0.85 ± 0.05 |
