Fig. 5. Representation of planar diffusion for the bovine tongue (coronal imaging slice). The orientation of the diffusion tensor's greatest two eigenvectors, the plane of maximum intra-voxel fiber angle dispersion, is represented by the end-planes of graphic cylinders derived from a coronal slice of the lingual core. Contrast was seen between the tongue core, where the planes of fiber angle dispersion were transverse to the antero-posterior axis of the tongue, and the tongue sheath, where these planes were approximately parallel to the nearby tongue surface. (Reproduced with permission from Wedeen et al., 2001.)