Reptilian Brain (Brain Stem): Instinctual survival; fundamental activities (breathing, heartbeat); regulating body temperature; managing our balance; processes pain, aggression, pleasure, and our drive to mate
Mammalian Brain (Emotional Limbic System Tissue): Modify and refine well-organized data from the brain stem by streaming it through the filter of emotion; make an automatic threat assessment based on how something feels.
Human Brain: Directly modifies and refines the underlying emotional limbic tissue of our left-brain and right-brain.