The corpus callosum is the part of the brain the connects the left and right hemispheres of the cerebral cortex.
Most of the communication between the two halves of the brain is carried over the corpus callosum. Some studies have shown that women have more fibers in the posterior portion of the corpus callosum. This added ability for cross-talk within the brain may account for the tendency for women to be more intuitive and better multitaskers. This interconnect is also very important for reading. This may be why dyslexia is five times more common in men versus women.