The limbic system is in the subcortical area at the center of the brain. This is the part of the brain that sets a person's emotional tone and stores highly charged emotional memories, both positive and negative.
Some authors discuss the concept of limbic seizures.
Studies consistently find that when a structure termed the amygdala, in the limbic system, is stimulated the person becomes more agitated and aggressive. The limbic system is often cited as that part of the brain which sets the mood. Abnormal activity in this area of the brain may be associated with significant moodiness. There's an area of the brain surrounding the limbic system called the basal ganglia. It contains some of the largest structures in the brain.