The cerebrum is made up of two hemispheres called the cerebral hemispheres. The brain is divided into three parts - forebrain, midbrain and hindbrain. Forebrain constitutes cerebrum, thalamus and hypothalamus. Midbrain constitutes the corpora quadrigemina which contains reflex centres involving eye movements and auditory responses. Hindbrain constitutes the pons, medulla and cerebellum.