Fig. 2.

Sample for each bundle of interest (cingulum, uncinate, arcuate) with the streamline representations obtained from tractography. Three alternative voxel-based representations are obtained for each bundle with different thresholds on the number of streamlines crossing the voxels. The threshold used in our study was considered optimal, preventing spurious voxels including few streamlines to be selected (see the uncinate representation for a low threshold) and preserving the topology of the bundle (see the split representation of arcuate branches for a high threshold). Note that from the low to the right threshold, the diameter of the bundle core decreases without qualitative changes in the shape.