Two Sides Are Better Than One
Nerve fibers of the corpus callosum -- the big data cable linking both sides of the human brain -- are colored like an exotic caterpillar in this image from a recent paper in the Journal of Neuroscience. The colors denote its five major divisions. Roberto Cabeza and Simon Davis mapped the activity across the callosum with functional MRI as study subjects were asked to perform word- and face-recognition tasks of increasing difficulty. They found a "bilateral processing advantage" -- subjects solved the problem quicker when both sides of the brain went to work.