Table 4.
Different patterns of distribution of the percentage (± SE) of small-, medium-, and large-diameter axons in segments I–V in autistic and control subjects
| Axon diameter (μm) | Group | Percentage of axons in CC segments | ||||
|---|---|---|---|---|---|---|
| S I | S II | S III | S IV | S V | ||
| < 0.651 | C | 34.6 (2.6) | 28.0 (3.0) | 20.5 (2.4) | 24.3 (5.6) | 19.1 (3.4) |
| A | 43.1 (2.2) | 35.0 (2.4) | 38.9 (7.9) | 37.8 (7.8) | 46.6 (6.2) | |
| p < | 0.027* | 0.093 | 0.058 | 0.175 | 0.0014** | |
| Diff. | + 24.42% | ns | ns | ns | + 143.7% | |
| 0.651–1.051 | C | 43.1 (1.3) | 43.8 (1.3) | 39.8 (1.2) | 35.4 (2.8) | 41.6 (2.0) |
| A | 42.2 (1.8) | 45.8 (2.1) | 40.8 (5.3) | 39.0 (4.2) | 36.9 (3.4) | |
| p < | 0.696 | 0.429 | 0.858 | 0.472 | 0.261 | |
| Diff. | ns | ns | ns | ns | ns | |
| > 1.051 | C | 22.2 (1.9) | 28.2 (2.1) | 39.6 (3.3) | 40.2 (3.8) | 39.2 (3.2) |
| A | 14.7 (1.3) | 19.0 (2.1) | 20.3 (3.0) | 23.1 (3.8) | 16.4 (3.1) | |
| p < | 0.005** | 0.008** | 0.007*** | 0.010** | 0.0001*** | |
| Diff. | −34.02% | −32.52% | −48.82% | −42.52 | −58.2% | |
SE Standard error, CC corpus callosum, S segment, C control, A autism; Diff., difference; ns, not significant. Standard errors in parentheses