What large bundle of nerve fibers connects the human brain’s left and right hemispheres?

The corpus callosum is the large bundle of nerve fibers connecting the human brain’s left and right hemispheres.

It contains millions of axons, many covered with myelin, that allow corresponding and complementary regions of the two cerebral hemispheres to exchange information. This communication helps coordinate perception, movement, language, and other complex activities.

The corpus callosum arches deep within the cerebrum and is commonly described in sections: rostrum, genu, body, and splenium. Different parts connect broadly corresponding areas, although the pattern is not a perfectly simple one-to-one map.

A popular oversimplification says that one hemisphere is purely logical and the other purely creative. In reality, both hemispheres participate in most complex tasks, and the corpus callosum supports their cooperation. In split-brain research, severing it produced unusual experimental effects, but it did not create two entirely independent personalities.