Limbic system. Computer artwork of a section through a human brain,showing the limbic system (green). The limbic system (or palaeomammalian brain) is a complex set of brain structures that lies on both sides of the thalamus,right under the cerebrum. It is not a separate system,but a collection of structures from the cerebrum,diencephalon,and midbrain,including the hippocampus,amygdalae,anterior thalamic nuclei,septum,limbic cortex and fornix. It supports a variety of functions,including emotion,behaviour,motivation,long-term memory,and olfaction |