Final answer:
The limbic system is a connected set of structures that regulates emotion, as well as behaviors related to fear and motivation. It includes the amygdala and the hippocampus. The amygdala is responsible for the sensation of fear and recognizing fearful faces, while the cingulate gyrus helps regulate emotions and pain.
Step-by-step explanation:
The limbic system is a connected set of structures that regulates emotion, as well as behaviors related to fear and motivation. It plays a role in memory formation and includes parts of the thalamus and hypothalamus as well as the hippocampus. One important structure within the limbic system is a temporal lobe structure called the amygdala (Greek for "almond"), illustrated in Figure 35.24. The two amygdala are important both for the sensation of fear and for recognizing fearful faces. The cingulate gyrus helps regulate emotions and pain.