Dr. David Servan-Schreiber, MD, PhD goes on to say that “Some cardiologists and neurologists go so far as to refer to a “heart-brain system” that cannot be dissociated.” The brain and the heart are connected via the autonomic peripheral nervous system, which is not under conscious control and regulates organ function. As I’ve discussed in many other posts, the sympathetic branch (fight or flight), raises heart rate, blood pressure etc. whereas the parasympathetic branch slows heart rate, lowers blood pressure etc. The goal for optimal health is to have the two branches balance each other, rather than have one branch (usually the sympathetic one) racing out of control. It is now known that the heart produces some of its own hormones, and actually has its own perceptions, which can influence the function of the whole body including the brain. It sends messages back to the brain via direct nerve connections also, creating an interconnected loop. So, learning how to control the heart can make a huge difference in our ability to come to peace with the emotional brain.