Final answer:
Disturbances in the limbic system have been implicated in mood disorders and anxiety disorders.
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. Two examples of mental illnesses that have been implicated in disturbances in the limbic system are mood disorders and anxiety disorders. Increased amygdala activity, which is part of the limbic system, is associated with learning to fear and is seen in individuals who are at risk for or suffering from mood disorders. Additionally, changes in the structure and function of the amygdala and hippocampus, another structure in the limbic system, have been demonstrated in adolescents with mood and anxiety disorders.