The brain is wired in a 3D grid structure

April 04, 2012

Far from being just a tangle of wires, the brain's white-matter 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. [...]

If they can turn in just four directions: left, right, up or down, this may enforce a more efficient, orderly way for the fibers to find their proper connections -- and for the structure to adapt through evolution.

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