The limbic system supports a variety of functions but one of the major is in the creation of emotion. Besides that, this system regulates behavior, motivation, long-term memory, and olfaction, by connecting the endocrine system and the autonomic nervous system..
The limbic system is not a separate system but a collection of structures from the different regions of brain. It includes the hypothalamus, the hippocampus, the amygdala, and several other nearby regions.