Human brain and limbic system. Artwork of the structures of the human brain,including the cerebellum (green) and brainstem (yellow,above spinal cord). The front of the brain is at left. At the centre of the brain is the limbic system (yellow),the complex network of nerve pathways involved with expression of human instinct and mood. Brain regions shown here include the thalamus,the pituitary gland (hypophysis,pink),the amygdala,the hippocampus,the putamen,and the caudate nucleus. Activities governed by the limbic system include self-preservation,reproduction,expression of fear,rage,pleasure,and the formation of memory |