Fig. 3.

White matter tract profilometry. a. The core tract is computed for each tract (inner tube). An example is provided for the left IFOF in the top panel. The corresponding Fractional Anisotropy (FA) profile is extracted by taking a weighted average of the FA measurements of each individual fiber (see bottom panel). b. Visualization of the anatomy of some of the white matter tracts of interest. From left to right: the left inferior fronto-occipital fasciculus (left IFOF), the Cross-callosal tract (anterior Frontal CC), the right corticospinal tract (right CST), and the right vertical occipital fasciculus (right VOF). c. FA profile analysis. FA profile mean ± sd are plotted for each tract and for the early vs. late recovery groups (blue and orange, respectively). To minimize partial volume effects when computing the mean by averaging the FA measurements along the tract, only nodes from 10 to 90 were taken into account, disregarding the extremities of the tracts. The two tracts on the left have a high effect size (d > 1), while the two tracts on the right have a poor effect size (d < 1). (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)