The corpus callosum, the largest white matter structure in the brain, is primarily responsible for this integration. It is a thick bundle of about 200 million axons, each extending from a pyramidal cell on one side of the brain to the other side. These axons, together with some minor wire bundles, tightly coordinate the activities of the two cerebral hemispheres so that they work together effortlessly, giving rise to a single view of the world.
