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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Trends Neurosci. 2013 Dec 31;37(2):106–123. doi: 10.1016/j.tins.2013.11.001

Fig 4. Human Connectome.

Fig 4

The diffusion of water in the brain is greater along the lengths of axons than it is across axons. Diffusion MRI (dMRI) reveals the directions along which water diffusion is greatest. The probabilistic trajectories from a frontal cortex starting point that end at other locations on the cortical surface are shown. 3D orientation vectors shown as RGB colored sticks (red: left-right, green: anterior-posterior, blue:inferior- superior) show the estimated directions of white matter fibers through each 1.25mm cubic volume of brain (voxel), the resolution of the diffusion MRI data. Intersection of color tracts suggests connectivity. Adapted with permission153