Tag Archives: vagus-nerve

Polyvagal Theory, what is it exactly:

Polyvagal Theory, what is it exactly: Polyvagal Theory is a neuroscientific theory developed by Dr. Stephen Porges in the 1990s. This theory provides insights into the autonomic nervous system’s (ANS) role in regulating our physiological responses and how these responses influence our behavior, emotions, and social interactions. The theory is named after the vagus nerve, a key component of the ANS. Here are the key concepts of Polyvagal Theory:

  1. Autonomic Nervous System (ANS): The ANS is responsible for regulating involuntary physiological processes in the body, such as heart rate, digestion, and respiratory rate. It consists of two branches: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
  2. Three Neural Circuits: Polyvagal Theory posits that there are three distinct neural circuits within the PNS, each associated with different evolutionary stages and corresponding behavioral and physiological responses: a. Ventral Vagal Complex (VVC): This is the most recently evolved part of the vagus nerve and is associated with the social engagement system. When the VVC is active, individuals are in a state of calm, social engagement, and connection. This is when we are most receptive to social interactions, empathy, and communication. b. Sympathetic Nervous System (SNS): The SNS is responsible for the “fight or flight” response. It prepares the body for action in response to perceived threats, leading to increased heart rate, muscle tension, and decreased social engagement. c. Dorsal Vagal Complex (DVC): The DVC is associated with immobilization and shutdown responses. When the DVC is activated, it can lead to behaviors like withdrawal, dissociation, and even fainting. It’s a protective response that can be triggered when an individual perceives overwhelming danger.
  3. Hierarchy of Responses: According to Polyvagal Theory, our autonomic nervous system responds hierarchically, with the VVC being the most evolved and socially engaged, followed by the SNS’s “fight or flight” response, and finally the DVC’s shutdown response as the last resort.
  4. Trauma and Regulation: The theory suggests that individuals who have experienced trauma or have difficulty regulating their autonomic responses may become stuck in SNS or DVC states, leading to emotional and social difficulties.

Polyvagal Theory has been influential in fields such as psychology, psychiatry, and therapy because it helps professionals understand how the nervous system responds to stress and trauma. It has also led to the development of therapeutic interventions aimed at promoting regulation and social engagement, especially in individuals who have experienced trauma or struggle with emotional and social challenges. Overall, the theory provides a valuable framework for understanding the connection between our physiological responses and our emotional and social experiences.

Shervan K Shahhian

Polyvagal Theory, what is it:

Polyvagal Theory, what is it:

Polyvagal theory is a neurobiological framework developed by Dr. Stephen Porges to understand the autonomic nervous system (ANS) and its role in regulating social behavior, emotions, and stress responses. The theory suggests that the ANS, which is responsible for controlling involuntary bodily functions, is composed of three interconnected branches, each associated with different adaptive strategies.

Ventral Vagal Complex (VVC): This is the most evolved and recently evolved part of the autonomic nervous system. When activated, it promotes a state of calm, social engagement, and connection. It is associated with feelings of safety and is involved in positive social interactions.

Sympathetic Nervous System (SNS): This is commonly known as the “fight or flight” system. It is activated in response to perceived threat or danger, preparing the body to fight or flee. The SNS increases heart rate, releases adrenaline, and redirects blood flow to essential organs.

Dorsal Vagal Complex (DVC): This is the oldest part of the ANS and is associated with immobilization and shutdown responses. When activated, it can lead to behaviors such as freezing, dissociation, or fainting. It comes into play when the threat is overwhelming, and neither fighting nor fleeing is possible.

According to polyvagal theory, the autonomic nervous system dynamically shifts between these three states depending on the perceived level of safety or threat in the environment. The goal is to maintain a balance between the sympathetic and parasympathetic branches, allowing for appropriate responses to different situations.

Understanding polyvagal theory has applications in various fields, including psychology, trauma therapy, and healthcare. It provides insights into how our nervous system influences our behavior, emotional regulation, and social interactions. Therapeutic interventions based on polyvagal theory aim to help individuals regulate their autonomic nervous system responses and promote a sense of safety and connection.

Shervan K Shahhian