Fig 5. Diffusion anisotropy maps and diffusion tensor imaging-based white matter tractography of a representative boxer (A and B; 27 years old) and a control (C and D; 29 years old). Intensity is proportional to anisotropy and color shows the direction. The boxer has decreased anisotropy in CC and anterior and posterior limb of IC compared with the healthy control subjects. Fiber tracking showed overall fewer trackable white matter fibers in this boxer’s brain (B) compared with that of a control subject (D). The difference in fibers through the corpus callosum is particularly striking.