There are different approaches and theories related to the nervous system that we should be aware of as we move through our yoga practice and address mental health. Below we will review what the nervous system consists of and 2 approaches (Polyvagal Theory, 3 Gunas) that help us better understand them.   

Autonomic Nervous System

Main Differences Between Parasympathetic & Sympathetic Nervous Systems

The autonomic nervous system comprises two parts- the sympathetic and parasympathetic nervous systems. The sympathetic nervous system activates the fight or flight response during a threat or perceived danger, and the parasympathetic nervous system restores the body to a state of calm. 

In simple terms: PNS helps down regulate our nervous system while SNS helps up regulate our nervous system. 

Parasympathetic Nervous System (PNS)

The parasympathetic nervous system (PNS) controls homeostasis and the body at rest and is responsible for the body's "rest and digest" function. This part of your autonomic nervous system does the opposite of your sympathetic nervous system.

Sympathetic Nervous System (SNS)

The sympathetic nervous system (SNS) controls the body's responses to a perceived threat and is responsible for the "fight or flight" response. This system activates body processes that help you in times of need, especially times of stress or danger.

Polyvagal Theory

Polyvagal theory is a collection of evolutionary, neuroscientific, and psychological constructs pertaining to the role of the vagus nerve in emotion regulation, social connection and fear response, introduced in 1994 by Stephen Porges. 

With anxiety, depression, and stress on the climb, have you ever wondered how you can understand your reactions to life’s challenges and stressors? Or maybe you wondered how you can become more resilient? Did you know that you can map your own nervous system?

This is such a powerful tool that can help you shift the state of your nervous system to help you feel more mindful, grounded, and joyful during the day, and more importantly during your life. Before we discuss how to map your nervous system, let’s break down the autonomic nervous system a bit more.

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. 

Vagus Nerve: 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 its nerve fibers are sensory, which means the feedback is critical for the body’s homeostasis. Pretty amazing, wouldn’t you say?

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. Sound familiar?

Information above is from "How to map your nervous system"

Polyvagal Chart

Polyvagal theory is a collection of evolutionary, neuroscientific, and psychological constructs pertaining to the role of the vagus nerve in emotion regulation, social connection and fear response, introduced in 1994 by Stephen Porges. 

Three Nervous System States

How can you map your nervous system? 

1. Identify each state for you. 

Think of one word that defines each one of these states for you. The first step is identifying the word that you correlate with each of those three states. This is really important because then you’re able to recognize which state you are in and identify with it quickly. This will allow you to really tune in to your body and understand how you feel in that state, so you can help yourself get out of it.

For example, 

2. Identify your triggers and glimmers.

You’ll want to identify triggers for your fight/flight state as well as your freeze state. These could be things like a fight with your boss, an argument with your spouse, the death of a loved one, if someone cuts you off while driving, etc. It is whatever things that cause you to feel stressed. You want to eventually have at least one trigger, if not many, written down for each of those states.

Glimmers are the things that bring you to that optimal nervous system state. It could be something as simple as petting a dog or something bigger like going on a vacation.


Once you can identify what those states are for you, then you can recognize what your triggers and glimmers are for that state. You can really begin to make a profound difference in your nervous system state. You can take ownership of what’s happening to your body by tuning into how you feel and better understanding how to regulate your emotions and your responses to stress.

Ultimately, this is how we can begin to develop resilience. This means being able to have responded appropriately to life’s challenges, go to that fight or flight state for a short period, and then return back to your state of social engagement. To truly enjoy life, returning to your state of safety where you are mindful, grounded, and joyful, is a practice.

Information above is from "How to map your nervous system"

3 Gunas

Another way of looking at the states of the nervous system is through the 3 Gunas. The ancient teachings of yoga, like the Samkhya Philosophy and also the Bhagavad Gita, talk about three essential aspects of nature. 

3 Gunas

"Gunas" is a Sanskrit word for qualities or strands. 

The gunas are forces of energy that weave together to form everything in the universe. There are three gunas, each with its own unique attributes: 

Gunas: Mental Health Perspective

Source: Young Practice

We need all three to have balance. To create change, we need fire (rajas, energizes) + tea kettle (tamas, containment) + steam (sattva, change, contains body and emotion). 


Freeze & Submit response

couch potato


PNS (Parasympathetic Nervous System)


Fight or Flight response



SNS (Sympathetic Nervous System)


Alert & Relaxed (combo of Tamas & Rajas) 

 tend and befriend 

create change

ANS (Autonomic Nervous System) = PNS + SNS

Purpose in all 3 areas.

Fire = Creates the energy to move towards changing.

Tea Kettle =  Gives us something to contain this energy and produce the change we need. 

Steam = Is the result of bringing bot the tamas and raja together, creating a balance and/or necessary change.

The three Gunas are constantly interacting with one another. We can discern hints from this interplay in various English phrases. For example, “innocent pleasure” is sattva-infused rajas. And “rabid addiction” is rajas-propelled tamas.

The Gunas are permanent in essence but their interactions are transitory. 

The mind’s psychological qualities are similarly unstable and can fluctuate quickly.

The predominant Guna of the mind acts as a lens. It affects one’s perceptions and perspective of the world. Thus, if the mind is in rajas, one will experience world events as chaotic, confusing, and demanding. They will have a strong tendency to continue to react to events in this rajasic way.

Therefore, yogis work towards self-observation and discernment. This way, one can witness and not react to the activities of the Gunas. But one must also have the inner-strength and willpower to consciously shift their thoughts and actions. Turning away from tamas and rajas and towards sattvic balance gives us a purpose.

Still, the three Gunas can each be desirable for different yogic practices. 

Sattva Guna is activated by meditation. It can turn the mind inwards to stillness and peace. Rajas is activated by pranayama and dynamic yoga asanas. The inertia of tamas is invaluable when one wants to sit still and meditate.

But one can become too attached to any of the Gunas. If one is attached to silence and lightness, it can be difficult to deal with the comings and goings of everyday life. If one’s rajas is out of balance, they can manifest in anger and combativeness. If one is overly tamasic, they may act lazy and careless.

Balance is the key to navigating the Gunas. 

Source: Yoga Practice

Tips to help you reduce specific Gunas in your life.

All yogic practices are developed to create sattva in the mind and body. Thus, practicing yoga and leading a yogic lifestyle strongly cultivates one’s sattva.

But all Gunas can create attachment, thus binding oneself to one’s ego. 

Yogi goal is to cultivate sattva.


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How to Map Your Nervous System: Polyvagal System

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