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Fig 2. Right-sided corticospinal tracts, reconstructed from DTI data with ROIs chosen as described in "Methods." Axial sections are portions of color-coded maps derived from FA and the principal eigenvector. In these maps, blue represents tracts running in the rostrocaudal axis; green, anteroposterior; and red, mediolateral; oblique angles are represented by a mixture of colors. The decussation of the superior cerebellar peduncle is denoted by the white arrow at the level of the midbrain in B. 3D representation of the CSTs are superimposed on coregistered magnetization-prepared rapid gradient-echo scans, which are heavily T1-weighted. A, Reconstruction of the right whole-brain CST, with ROIs depicted in green. B, Reconstruction of hemispheric and brain stem portions of the right CST.
