Limbic Brain
The Limbic Brain evolved about 150 million years ago in birds and mammals, and houses primarily the centers of emotion.
Together, their parts form a cap or limbus around the R-brain. Hence the name limbic.
Since it links emotions with behavior, it suppresses the R-brain with its habitual ways of responding.
It contains both innate neural circuitry and circuitry that is modifiable by memories of new experiences.
