Supplementary Figure 4. Laterality index of the number of fibers of fascicles. Laterality index of the number of fibers (logit transform on y-axis) of each fascicle (colored bars, bottom; same color-code than in figure S3). The laterality index was calculated from the number of fibers (nf), which approximates the thickness of fascicle, in the left hemisphere, LH, and in the right hemisphere, RH: (LHnf – RHnf) / (LHnf + RHnf); for each of 12 subjects (right handed, n=5, black dash; ambidextrous, n = 2, grey circle; left handed, n= 5, grey dash); p values (italic) were only significant for the AF and the fpSLF (highlighted data, gray boxes; †, one-tailed test).