Dr. Porges Polyvagal Theory: Social, Danger and Shutdown
The terms “fight or flight” and “rest and digest” are typically what we refer to when discussing this autonomic nervous system. However, there are different aspects of the nervous system referred to as the polyvagal theory, developed by Dr. Stephen Porges. The vagus nerve, referred to as the wandering nerve in Latin, is one of the longest nerves and is a cranial nerve that originates in the brainstem and innervates the muscles of the throat, circulation, respiration, digestion and elimination. The vagus nerve is the major constituent of the parasympathetic nervous system and 80 percent of it’s nerve fibers are sensory, which means the feedback is critical for the body’s homeostasis. . When we are in this stressed state or potentially anxious state, then we cannot be curious, or be empathetic at the same time. In addition to not being able to be empathetic or curious, we are also not able to break the prefrontal cortex, the part of the brain responsible for executive function, communicating, guiding, and coordinating the functions of the different parts of the brain, back online. This essentially means that we are not able to regulate our attention and focus. . Our three-part nervous system 1. First, our “fight and flight” response is our survival strategy, a response from the sympathetic nervous system. If you were going to run from tiger, for example, you want this response to save your life. When we have a fight response, we can have anger, rage, irritation, and frustration. If we are having a flight response, we can have anxiety, worry, fear, and panic. Physiologically, our blood pressure, heart rate, and adrenaline increase and it decreases digestion, pain threshold, and immune responses. . 2. Second, we have a “freeze” state, our dorsal vagal state, which is our most primitive pattern, and this is also referred to as our emergency state. This means that we are completely shut down, we can feel hopeless and feel like there’s no way out. We tend to feel depressed, conserve energy, dissociate, feel overwhelmed, and feel like we can’t move forward. Physiologically, our fuel storage and insulin activity increases and our pain thresholds increase. . 3. Lastly, our “rest and digest” is a response of the parasympathetic system, also known as a ventral vagal state. It is our state of safety and homeostasis. If we are in our ventral vagal state, we are grounded, mindful, joyful, curious, empathetic, and compassionate. This is the state of social engagement, where we are connected to ourselves and the world. Physiologically, digestion, resistance to infection, circulation, immune responses, and our ability to connect is improved. . As humans, we have and will continue to experience all of these states. We may be in a joyful, mindful state and then all of a sudden due to a trigger, be in a really frustrated, possibly angry state, worried about what may happen to then feeling completely shut down. This is human experience. We are going to naturally shift through the states. However, when we stay in this fight or flight or this shut down/freeze state, that is when we begin to have significant physiological effects and also mental/emotional effects. This could be an emergency state. This can also be a suicidal state, if we are in this shut down mode for too long. If we are in a fight or flight state, we can have constant activation of our stress pathway, also known as the HPA axis, and we can really impact our stress hormones, sex hormones, our thyroid, etc. This stress will have significant inflammation effects on the body as well. All of these states can have considerable effect on our overall health, positive or negative, of course. Also, you can not get well if you are not in your “safe” state. No treatment intervention or professional will help you if you are not safe. This is why it’s really important to identify the states for each of you. .