Brain, historical artwork. The top drawing shows the brain cut in-between its hemispheres. The front of the brain is on the left. The cerebrum (brown) is the largest and most developed part of the brain, it is responsible for intelligence, language, movement and memory. The cerebellum is at lower right (brown and white), it co-ordinates muscles and balance. The brainstem is at lower centre (white), it controls automatic functions, such as breathing. The brain stem is separated from the cerebrum by the corpus callosum (white, centre). The bottom diagram shows a large bundle of nerve fibres (fasciculi) entering the cerebrum from the brainstem.