Table 1.
Mean (standard deviation) of lumbar and caudal disc geometry by level.
| Level | Height (mm) | WAP (mm) | WL (mm) | NAP (mm) | NL (mm) | Area (mm2) | JP (mm4) |
|---|---|---|---|---|---|---|---|
| L1-L2 | 0.76 (0.01) | 2.78 (0.24) | 4.19 (0.17) | 0.83 (0.24) | 1.74 (0.22) | 8.1 (1.0) | 14.3 (2.0) |
| L2-L3 | 0.72 (0.05) | 3.20 (0.26) | 4.62 (0.35) | 0.80 (0.40) | 1.94 (0.79) | 10.4 (2.5) | 23.0 (7.5) |
| L3-L4 | 0.76 (0.05) | 3.14 (0.47) | 4.36 (0.19) | 0.98 (0.11) | 1.80 (0.14) | 9.7 (1.8) | 19.2 (3.9) |
| L4-L5 | 0.77 (0.03) | 3.72 (0.35) | 4.96 (0.05) | 1.06 (0.18) | 1.51 (0.08) | 13.3 (1.7) | 34.8 (5.2) |
| L5-L6 | 0.99 (0.12) | 4.05 (0.04) | 4.85 (0.22) | 1.09 (0.19) | 1.55 (0.06) | 14.6 (0.6) | 38.6 (4.4) |
| Lumbar Avg | 0.80 (0.11) | 3.38 (0.51) | 4.60 (0.33) | 0.95 (0.13) | 1.71 (0.18) | 11.2 (2.7) | 26.0 (10.4) |
| C9-C10 | 0.94 (0.01) | 4.33 (0.16) | 4.35 (0.15) | 1.16 (0.10) | 1.42 (0.07) | 13.3 (0.7) | 34.5 (2.5) |
| C10-C11 | 0.96 (0.01) | 4.11 (0.59) | 4.33 (0.08) | 1.41 (0.28) | 1.63 (0.19) | 12.1 (1.6) | 31.2 (8.4) |
| C11-C12 | 1.03 (0.10) | 4.37 (0.10) | 4.34 (0.27) | 1.54 (0.17) | 1.48 (0.39) | 12.8 (1.4) | 34.9 (5.4) |
| Caudal Avg | 0.98 (0.05) | 4.27 (0.14) | 4.34 (0.01) | 1.37 (0.19) | 1.51 (0.11) | 12.7 (0.6) | 33.5 (2.0) |