It was previously thought the inside of the brain resembled the
assembly of a bowl of spaghetti noodles. Researchers have now
discovered that a more uniformed grid-like pattern makes up the
connections of the brain. The researchers used a recently-
developed method called diffusion spectrum imaging to infer the
position of nerve fibers in the living human brain from the way
water flows through and around them. These scans revealed an
orderly weave of fibers — a much simpler organization than many
scientists would have suspected. Scans in four monkey species
found a similar pattern. The researchers suggest that this grid-
like organization may be advantageous during brain development,
providing the equivalent of highway lane markers to help growing
nerve fibers find their way to the appropriate destination.
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