Visualization of diffusion tensors. The blue lines represent the in-plane component of the principal diffusion direction; the other colors show the magnitude of the out-of-plane component, with orange/red indicating maximal diffusion. The white and green arrows point to the corpus callosum and the anterior commissure, respectively, two major fiber tracts with the largest in-plane diffusion component, while the blue and pink arrows indicate the cingulate and uncinate fasciculi, fibers with the biggest out-of-plane diffusion component.