The corpus callosum is a large collection of nerve fibres, situated within the brain, connecting the two cerebral hemispheres to each other. It plays an integral role in the complex interplay between these sides, allowing the rapid and efficient communication of information, forming an essential bridge between thought and emotion, imagination and action. Without the corpus callosum, the brain's neural networks and their disparate actions would be comparably isolated, making full integration between the hemispheres impossible and constraining the potential of the entire neurological system.

See also: right hemisphere, left hemisphere, brain damage, split brain