Table 1.
Corpus Callosum Measures
| Mean (SD) values | Age at peak value | Linear slopea | ||||||
|---|---|---|---|---|---|---|---|---|
| Sexes combined (n = 305) | Men (n = 160) | Women (n = 145) | Sexes Combined (n = 305) | Men (n = 160) | Women (n = 145) | Before age peak | After age peak | |
| Area | 621.5 (98.9) | 637.4 (99.7) | 603.9 (95.4) | 40.80 | 38.63 | 42.31 | 0.450** | −0.091 |
| Perimeter | 203.8 (16.9) | 206.3 (17.9) | 201.0 (15.3) | 51.18 | 50.31 | 50.70 | 0.408** | 0.089 |
| Circularity | 0.188 (0.023) | 0.189 (0.024) | 0.187 (0.021) | 19.50 | 8.13 | 29.82 | N/Ab (m) −0.001 (f) | −0.318** (m) −0.276 (f) |
| Length | 73.7 (5.2) | 74.3 (5.4) | 73.1 (4.9) | 45.02 | 45.02 | 44.25 | 0.410** | 0.029 |
| Subregions | ||||||||
| Witelson 1 | 21.6 (8.8) | 22.9 (9.9) | 20.3 (7.2) | 49.43 | 48.61 | 47.59 | 0.337** | 0.193 |
| Witelson 2 | 137.9 (27.9) | 141.4 (30.0) | 134.3 (24.8) | 35.75 | 32.19 | 40.07 | 0.193 (m) 0.376**(f) | −0.292* (m) −0.172 (f) |
| Witelson 3 | 88.5 (16.1) | 90.7 (15.8) | 86.0 (16.2) | 41.88 | 40.78 | 43.26 | 0.324** | −0.017 |
| Witelson 4 | 72.7 (12.8) | 74.7 (12.7) | 70.5 (12.7) | 40.78 | 38.63 | 41.88 | 0.465** | −0.120 |
| Witelson 5 | 62.2 (11.4) | 63.8 (11.1) | 60.5 (11.6) | 40.16 | 38.63 | 41.62 | 0.423** | −0.141 |
| Witelson 6 | 52.7 (12.5) | 54.5 (12.0) | 50.7 (12.7) | 38.63 | 35.33 | 40.07 | 0.257** | −0.110 |
| Witelson 7 | 185.8 (30.3) | 189.5 (31.6) | 181.7 (28.4) | 45.23 | 45.02 | 45.23 | 0.359** | −0.074 |
| Hampel 1 | 194.2 (29.9) | 198.2 (32.0) | 189.7 (26.6) | 38.26 | 36.87 | 40.07 | 0.392** | −0.337** |
| Hampel 2 | 86.9 (19.3) | 89.9 (18.9) | 83.5 (19.2) | 38.26 | 35.33 | 41.88 | 0.257** | −0.196 |
| Hampel 3 | 71.2 (16.9) | 73.9 (15.6) | 68.2 (17.7) | 43.26 | 40.78 | 45.23 | 0.288** | −0.045 |
| Hampel 4 | 75.1 (20.3) | 78.9 (18.9) | 70.9 (21.0) | 45.23 | 41.35 | 45.23 | 0.179** | −0.127 |
| Hampel 5 | 194.1 (30.4) | 196.5 (31.7) | 191.5 (28.7) | 42.97 | 42.56 | 42.91 | 0.428** | 0.007 |
| Intracranial Vol (mm3) | 1,528,168 (182,975) | 1,619,129 (160,564) | 1,427,796 (151,247) | – | – | – | – | |
Note: Univariate statistics are reported for descriptive purposes only.
a
Slope reported separately for females (f) and males (m) where a significant age by sex interaction was found.
b
Slope not reported due to an insufficient number of males younger than the peak age.
*Correlation is significant at the 0.05 level (two‐tailed); **Correlation is significant at the 0.01 level (two‐tailed).