cerebellum the part of the brain at the back of the skull in vertebrates. Its function is to coordinate and regulate muscular activity. or cerebrum the principal and most anterior part of the brain in vertebrates, located in the front area of the skull and consisting of two hemispheres, left and right, separated by a fissure. It is responsible for the integration of complex sensory and neural functions and the initiation and coordination of voluntary activity in the body.
