Figure 8

Myeloarchitecture of corpus callosum (cc).

The orientation angle of the myelin fibers was calculated for several regions (a–i) and analyzed by orientation angle histograms in polar coordinate plots. In the histograms, the frequency distribution, as a percent of the fibers, with respect to the orientation angle are displayed. In the middle of the cc, most of fibers (80%) are aligned in parallel (f) and almost no cell bodies are shown, whereas, some cell bodies are distributed in other region of cc. The alignment of the fiber becomes irregular as it nears the cingulum bundle (c,h) and at the fiber terminal (a,b,i).