The limbic system is a group of brain areas involved in feeling emotions such as fear, anger, and happiness; motivating behaviors driven by primitive urges, such as aggression, pleasure-seeking and sexual urges; and even learning and memory. The Latin term limbus is translated as edge or border. This system takes its name from the location of these regions, which are buried under the surface where the edge of the cerebrum (the largest part of the brain, split into two hemispheres) sits just above the brain stem.

Because the limbic system controls the basic emotions and urges that drive our behavior, it is fundamental to survival. Dysfunction in any of these brain regions, or the connections between them, is believed to underlie the distress and difficulties suffered ...

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