White matter refers to connections that are myelinated, coated in a layer of insulation, allowing for fast far-range communication between information hubs.
And although a big fissure separates the left and right hemispheres, the two halves communicate, through a series of myelinated axon fibers called the corpus callosum.
Arrows shot from recurve bows fly, on average, around 240 kilometers per hour, which means that given a sufficiently long, myelinated, or large-diameter neuron, your thoughts actually could win the race.