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  • Christopher Land

    "Far from being just a tangle of wires, the brain's connections turn out to be more like ribbon cables -- folding 2D sheets of parallel neuronal fibers that cross paths at right angles, like the warp and weft of a fabric," explained Van Wedeen, M.D., of Massachusetts General Hospital (MGH), A.A. Martinos Center for Biomedical Imaging and the Harvard Medical School. "This grid structure is continuous and consistent at all scales and across humans and other primate species."

  • Alice Stoddard

    Rainbow Map of the Brain by M. D. Van Wedeen reveals an orderly lattice of nerve fibers that intersect at roughly right angles. Science NOW. http://tinyurl.com/7le3f77 #Brain #Neuroscience #M_D_Van_Weeden #ScienceNow #Greg_Miller

  • The Festive Anthropologist

    Animal Brains, More Beautiful Than You Could Ever Imagine | Smithsonian.com Previously scientists traced axon pathways in dissected animal brains, but now they can see the structure of this amazing information superhighway in a living human organ. Using new software with a technique called “diffusion tensor MRI” that tracks water molecules as they move along the axons, Van Wedeen of Massachusetts General Hospital and colleagues found that the fibers are arranged in a surprisingly regular 3-D grid. For instance, the red axons in the image converge on the purple pathway at a 90-degree angle. Axons are interwoven like “the warp and weft of a fabric,” the researchers say, with the pattern bent along the brain’s convolutions.

  • Excalibur Healthcare

    Simple 3-D Grid Structure Underlying Complexity of Primate Brain This is a diffusion spectrum MR image of human brain showing curvature of two-dimensional sheets of parallel neuronal fibers that cross each other at right angles. (Credit: Van Wedeen, M.D., Martinos Center for Biomedical Imaging, Massachusetts General Hospital)

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