Table 3.
Relative lengths of human neuronal spinal cord segments.
| Segment | Percentage of spinal cord | Cumulative percentage of spinal cord |
|---|---|---|
| C1 | 1.6 | 1.6 |
| C2 | 2.2 | 3.9 |
| C3 | 3.5 | 7.3 |
| C4 | 3.5 | 10.8 |
| C5 | 3.5 | 14.3 |
| C6 | 3.3 | 17.6 |
| C7 | 3.2 | 20.8 |
| C8 | 3.4 | 24.1 |
| T1 | 3.6 | 27.7 |
| T2 | 3.9 | 31.6 |
| T3 | 4.4 | 36 |
| T4 | 5 | 41 |
| T5 | 5.1 | 46.1 |
| T6 | 5.6 | 51.8 |
| T7 | 5.6 | 57.4 |
| T8 | 5.4 | 62.7 |
| T9 | 5.1 | 67.8 |
| T10 | 4.7 | 72.4 |
| T11 | 4.3 | 76.7 |
| T12 | 3.9 | 80.6 |
| L1 | 3.6 | 84.2 |
| L2 | 2.8 | 87 |
| L3 | 2.4 | 89.4 |
| L4 | 2.2 | 91.6 |
| L5 | 1.7 | 93.3 |
| S1 | 1.5 | 94.9 |
| S2 | 1.6 | 96.4 |
| S3 | 1.4 | 97.8 |
| S4 | 1.3 | 99.1 |
| S5 | 0.9 | 100 |
With data from the articles in Table 2, we calculated the relative proportions of each spinal cord neuronal segment relative to the length of the whole spinal cord.
C, cervical; T, thoracic; L, lumbar, S, sacral.