Callous body

Made up of white matter, the corpus callosum is about 10 centimeters long, resembles a C with the convexity facing up, and includes more than 200 million commessural fibers.
According to the most classic of the anatomical descriptions of the corpus callosum, the latter can be divided into 4 characteristic regions, which take the name of: rostrum, knee, trunk and splenium.
The main function of the corpus callosum is to allow the exchange of motor, sensitive and cognitive information between the various lobes of the two cerebral hemispheres.
For reasons not yet fully understood, some individuals are born without the corpus callosum. The total or partial absence of the corpus callosum takes the name of agenesis of the corpus callosum.