Cerebrum is the anterior part of the brain in vertebrates, consisting of two hemispheres, left and right, separated by the corpus callosum. It is much folded due to the presence of ridges and grooves on its outer surface. Left hemisphere of the cerebrum controls right portion of the body and right hemisphere control left portion. Each hemisphere is internally hollow and two area are present in its wall. The outer area has cyton of nerve cells and due to grey in colour, it is called grey matter. The inner areas are made up of white axon fibres and that is called white matter. Cerebrum is responsible for the integration of complex sensory and neural functions and the initiation and coordination of voluntary activities in the body.