Hagmann et al propose that diffusion MRI provides an efficient methodology to generate large, comprehensive and individual white matter connectional datasets of the living or dead, human or animal brain. This non-invasive tool enables study of the basic and potentially complex network properties of the entire brain. For two human subjects they find that their individual brain networks have an exponential node degree distribution and that their global organization is in the form of a small world. The link to their article takes you to three fascinating movies: one showing whole brain tractography, a second showing partition of the white-gray matter interface into approximately 1000 regions of interest, and the third, included here via YouTube so you don't have to download the quicktime movie, showing connections between different visual areas.
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