<Tr> <Th> FMA </Th> <Td> 86464 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terms of neuroanatomy (edit on Wikidata) </Td> </Tr> <P> The corpus callosum (Latin for "tough body"), also callosal commissure, is a wide, thick, nerve tract consisting of a flat bundle of commissural fibers, beneath the cerebral cortex in the brain . The corpus callosum is only found in placental mammals . It spans part of the longitudinal fissure, connects the left and right cerebral hemispheres, enabling communication between them . It is the largest white matter structure in the human brain, about ten centimetres in length and consisting of 200--300 million axonal projections . </P> <P> A number of separate nerve tracts, classed as subregions, of the corpus callosum connect different parts of the hemispheres . The main ones are known as the genu, the rostrum, the trunk or body, and the splenium . </P>

What is the main function of the corpus callosum