Brain wiring a no-brainer? Scans reveal astonishingly simple 3D grid structure

Brain wiring a no-brainer? Scans reveal astonishingly simple 3D grid structure: "The brain appears to be wired more like the checkerboard streets of New York City than the curvy lanes of Columbia, Md., suggests a new brain imaging study. The most detailed images, to date, reveal a pervasive 3D grid structure with no diagonals, say scientists funded by the National Institutes of Health."