corpus callosum

the main "bridge" between the left and right cerebral hemispheres; a broad bundle of myelinated fibers (white matter) carrying information from regions in one lobe to similarly placed regions in the opposing lobe. There are some 300 million fibers in the average corpus callosum. Cutting the corpus callosum prevents communication between the hemispheres (creating the well-known "split-brain" cases), and is used in severe cases of epilepsy.

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