TABLE 1:
Rotations at each lumbar level in the control subjects
| Subject No. | Level | Rotation (degrees) | MR Appearance of Intervertebral Disk |
|---|---|---|---|
| 1 | L1-L2 | −1.0 | Normal |
| L2-L3 | 2.1 | Normal | |
| L3-L4 | 1.8 | Normal | |
| L4-L5 | 0.8 | Normal | |
| L5-S1 | 0.8 | Normal | |
| 2 | L1-L2 | −0.5 | Normal |
| L2-L3 | 0.3 | Normal | |
| L3-L4 | 1.7 | Normal | |
| L4-L5 | −0.4 | Normal | |
| L5-S1 | 1.9 | Normal | |
| 3 | L1-L2 | 0.5 | Normal |
| L2-L3 | 0.8 | Normal | |
| L3-L4 | −0.1 | Normal | |
| L4-L5 | 1.3 | Normal | |
| L5-S1 | 2.6 | Normal | |
| 4 | L1-L2 | 0.1 | Normal |
| L2-L3 | 0.9 | Normal | |
| L3-L4 | 1.0 | Normal | |
| L4-L5 | 1.3 | Normal | |
| L5-S1 | 1.2 | Normal | |
| 5 | L1-L2 | 3.0 | Normal |
| L2-L3 | −1.8 | Normal | |
| L3-L4 | −0.2 | Normal | |
| L4-L5 | 5.7 | Normal | |
| L5-S1 | 2.8 | Abnormal |