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Figure 4


Fig. 4. 3-D multislice diffusion tensor MRI representation of the bovine tongue. Coronal slices comprising the bovine tongue obtained by diffusion tensor imaging are shown, with muscle components identified. At each voxel, an octahedron is placed whose shape approximates the local diffusion tensor. The fiber orientation corresponds to the octahedron's long axis and its color to the 3-D orientation. The color code is shown in the color sphere (inset). The sheath consisting of superior and inferior longitudinal muscles is blue, corresponding to its longitudinal fiber orientation, and the tongue core is red and green, corresponding, respectively, to horizontal and vertical fiber orientations, whereas the extrinsic genioglossus and hyoglossus muscles are oblique, and thus coded blue–green. (Reproduced with permission from Wedeen et al., 2001.)





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