Fig. 2.

ILF and IFOF: deterministic and probabilistic tractography with group masks. Both deterministic and probabilistic tractography resulted in non-specific tracts, and so we constructed group probability maps for each tract (Galantucci et al., 2011) and used these group probability maps (at least 50% of subjects) to mask out non-specific tracts. (a) The relative trajectories of this mask of ILF and IFOF tracts for deterministic tractography. (b) Fractional anisotropy in ILF and IFOF tracts showed no statistically significant differences between the two groups for any of the tracts (Table 4). (c) The relative trajectories of this mask of ILF and IFOF tracts for probabilistic tractography. (d) Again, no significant group differences were found in fractional anisotropy for any of the tracts (Table 4).