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Fig 3. MR imaging parameters restricted to the corticospinal tracts of the subject shown in Figs 1 and 2. Left column shows parameter distributions restricted to the CSTs in the whole brain (blue), brain stem (green), and hemispheres (magenta). Each box shows the IQR across the entire reconstructed tract of the parameter labeled on the vertical axis, with the central line representing the median. Middle column shows median MR imaging parameters for the right (black) and left (red) CST, as a function of distance from the lowest section in the medulla. Data are taken from the whole-brain reconstructions. Right column shows IQR versus distance. For this individual, distances <20 mm correspond approximately to the medulla; 20–45 mm, to the pons; 45–60 mm, to the midbrain; 60–85 mm, to the internal capsule; 85–120 mm, to the corona radiata; and >120 mm to the subcortical white matter. For easier visualization, plots in the middle and right columns exclude highly variable data from the lowest and highest sections. Units: ms (T1, T2); 10–3 mm2/s (MD, 
1, 2, 3, 
).
