Corpus callosum is a bundle of the largest mass of white matters in the brain. It consists of approximately 190 to 250 million myelinated axons that connect the right and left hemispheres of the brain. Myelinated axons act as an insulating wire used by the brain for communication among the right and left sides of the brain. It is worth mentioning that this structure varies since it is made up of different structures performing specific functions among the right and left hemispheres of the brain. Anatomically, the corpus callosum comprises five structures called rostrum, genu, body, isthmus, and splenium. While the rostrum connects the olfactory bulb to the brain through a pair of thin bundles of axons, the genu connects the anterior parts of the corpus callosum to the frontal pole of the brain through a small part of the body. The genu, along with the rostrum and part of the body, is responsible for the connection of the prefrontal and supplementary motor cortices. On the other hand, the posterior part is referred to as the splenium. It is responsible for the connection of the parietal, temporal, and occipital lobes. The corpus callosum grows greatly through time from birth till early adulthood. It grows rapidly from 3 years to 10 years old, which coincides with the period of development of fine motor skills, bilateral coordination, and sensory-motor integration. If the development process gets interrupted or slowed down at this crucial period, it might result in disorders in bilateral coordination, motor skills and attention deficit. add on more content