Table 3.
Results of quadratic regression analyses of the 5 lobes.
| Lobe | Age correlation | Cortical thickness | Intrinsic curvature (lh/rh) | |
|---|---|---|---|---|
| (lh/rh) | Pial surface | White surface | ||
| Frontal | Gyri | –(0.414/0.259) | +(0.245/0.271) | +(0.448/0.457) |
| Sulci | –(0.284/0.271) | –(0.366/0.315) | +(0.387/0.391) | |
| Gyri/Sulci ratio | +(0.078/ N.A.) | +(0.494/0.485) | N.A. | |
| Parietal | Gyri | –(0.414/0.259) | +(0.192/0.185) | +(0.461/0.446) |
| Sulci | –(0.483/0.478) | –(0.443/0.436) | +(0.223/0.201) | |
| Gyri/Sulci ratio | +(0.261/0.248) | +(0.561/0.545) | +(0.243/0.187) | |
| Temporal | Gyri | –(0.350/0.353) | +(0.228/0.197) | +(0.408/0.388) |
| Sulci | –(0.623/0.594) | –(0.609/0.561) | +(0.220/0.198) | |
| Gyri/Sulci ratio | +(0.493/0.426) | +(0.585/0.498) | +(0.202/N.A.) | |
| Occipital | Gyri | –(0.117/0.142) | N.A. | +(0.324/0.251) |
| Sulci | –(0.561/0.583) | –(0.386/0.358) | N.A. | |
| Gyri/Sulci ratio | +(0.513/0.490) | +(0.418/0.314) | +(0.299/0.263) | |
| Cingulate | Gyri | –(0.414/0.259) | N.A. | +(0.358/0.220) |
| Sulci | –(0.284/0.271) | –(0.378/0.368) | +(0.143/0.295) | |
| Gyri/Sulci ratio | N.A. | +(0.413/0.218) | +(N.A./0.121) |
The significance of the curve fitting is evaluated using the permutation test, only the R2 for the significant curves were shown in the table (p < 0.05/108; adjusted by the Bonferroni correction for multiple comparisons). The variables are adjusted R2; + represents positive correlation, – represents negative correlation.