Imagine that your brain is a house, with both a downstairs and an upstairs. The downstairs brain includes the brain stem and the limbic region, which are located in the lower parts of the brain, from the top of your neck to about the bridge of your nose. Scientists talk about these lower areas as being more primitive because they are responsible for basic functions (like breathing and blinking), for innate reactions and impulses (like fight and flight), and for strong emotions (like anger and fear).
