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. Author manuscript; available in PMC: 2015 May 21.
Published in final edited form as: Neuroimage. 2013 Nov 21;88:143–154. doi: 10.1016/j.neuroimage.2013.11.025

Figure 7. Environmental Contributions to Tract Anisotropy.

Figure 7

Variations in diffusion parameters along tracts during normative development are likely a combination of tract specific (myelin content, axonal integrity) and local environment contributions. Voxel A contains a tract of interest (yellow) as well as a crossing tract (gray), resulting in low anisotropy measurements at this point. Voxel B contains only the tract of interest and exhibits high anisotropy. Within voxel C axons from nearby gray matter join the tract and some axons break off heading towards gray matter targets. The result would be a drop in anisotropy measurements at this point in the tract.