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Fig 4. Properties of the reconstructed corticospinal tracts. A, Number of reconstructed fibers. B, Tract volume. C and D, Medians (C) and IQRs (D), of individual MR imaging parameters restricted to the CSTs. Black points denote healthy individuals; green, the particular healthy subject of Figs 1–3; and red, an individual with MS. For green and red points, circles denote the right CST, and triangles, the left CST; for black points, the right and left sides are not distinguished. Also shown are means (central horizontal lines) and 99% normal ranges (delimited by flanking horizontal lines) across the population of healthy individuals. Parameter type is given in the vertical axis label for each graph in C; the same labels apply to panel D. Data are randomly scattered along the horizontal axis within each category, for easier visualization. For individuals scanned more than once, cross-scan means are plotted.
