Brain anatomy, illustration. The front of the brain is at left, with the spinal cord at lower right. The brain regions labelled here are: the medulla, the pons and the cerebellum (all purple; grouped together as the hindbrain), the midbrain (red), and the pituitary, hypothalamus and thalamus (all light blue). The latter three structures lie between the cerebral cortex (green) and the midbrain. The cerebral cortex is divided into two cerebral hemispheres.