Our three brains work together and separately, consciously and unconsciously to keep us alive, help us make decisions, feel emotions and communicate with others.
The part of this triune brain that keeps us alive is the Reptilian brain. The Reptilian brain prompts fight, flight or freeze when faced with a life-threatening or harmful event and operates primarily on an unconscious level. Let’s say you are on the sideline of a soccer match and out of your peripheral vision your brain senses a soccer ball zooming towards your face.
The Reptilian brain takes immediate action and causes you to duck out of the way. When this happens the Reptilian brain shuts down the prefrontal cortex, simply because there is no time to “think” before taking action. The Reptilian brain has performed its task in keeping you alive. The Reptilian brain cannot distinguish between real or imagined threats. This is why haunted housed or horror movies seem so real; to our brains, they are.
– See more at: http://suzannerucker.com/the-role-of-our-three-brains-and-the-use-of-emdr-therapy-in-trauma-situations/#sthash.bjSyfWdc.dpuf