The Vagus Nerve, Stress, and Kundalini Yoga

“Medical science says the vagus nerve is important, Kundalini Yoga says it is very important.”
– Yogi Bhajan

Why We Need a Survival Technology

In today’s world, many of us feel overwhelmed by constant demands — work, family, deadlines, screens, and the endless flow of information. The body responds to these pressures with a stress cascade: adrenaline, cortisol, and norepinephrine surge, the heart pounds, breathing becomes shallow, muscles tighten, and sweat glands activate. This fight-or-flight response is designed for emergencies, but in modern life it is often triggered by situations that are not life-threatening.

When stress accumulates, it can harm both body and mind. According to the World Health Organization, more than 264 million people worldwide live with depression, often combined with fatigue, poor sleep, and low concentration. Depression is now one of the leading causes of disability worldwide. Scientists increasingly point to the nervous system as a key factor in stress-related illnesses, with the vagus nerve in particular receiving more attention.

What Is the Vagus Nerve?

The vagus nerve is the tenth cranial nerve. Its name comes from the Latin vagus, meaning “wanderer,” because it travels from the brainstem through the throat, chest, and into the abdomen. Along the way, it connects with the vocal cords, heart, lungs, and digestive system.

Through these pathways, the vagus nerve:

• Controls muscles for swallowing and vocalisation
• Sends calming signals to the heart, lowering heart rate
• Regulates digestion by activating intestinal muscles and secretions

It is the main channel of the parasympathetic nervous system — the branch responsible for rest, recovery, and healing.

Stress, Inflammation, and the Vagus Nerve

When we are under pressure, the sympathetic nervous system drives the fight-or-flight response. The vagus nerve counterbalances this with signals to slow down, recover, and restore balance. Research shows that weakened vagal activity is linked with conditions such as arthritis, migraines, digestive issues, and even skin problems.

In medical settings, vagus nerve stimulation (VNS) has been used to treat epilepsy and treatment-resistant depression. Brain imaging studies show that VNS reduces overactivity in the limbic brain — the region involved in stress and emotional reactivity.

The vagus nerve also influences neurotransmitters such as serotonin, dopamine, and norepinephrine, which are essential for mood regulation. This is one reason why stimulating the vagus nerve can have antidepressant effects.

Kundalini Yoga and Vagal Tone

So where does yoga come in? Yogic breathing and mantra practice directly stimulate the vagus nerve. Slow, conscious breath increases vagal tone, which supports emotional balance and resilience. Chanting creates vibrations in the throat that activate vagal branches, producing effects similar to clinical VNS.

A pilot fMRI study on chanting “OM” (Kalyani et al., 2011) showed deactivation in limbic regions of the brain — the same regions calmed by vagus nerve stimulation. Kundalini Yoga has always emphasised this link. In yogic tradition, the vagus nerve is described as part of the central channel (sushumna), the “tuning string of the body” that brings harmony to the whole system when activated.

Practise 12 Minutes of Kirtan Kriya at Home

One of the most beautiful things about Kirtan Kriya is its simplicity. You don’t need previous meditation experience or a complicated routine to begin.

Here’s how to practise:

1. Find a comfortable position. Sit with your spine straight, hands resting on your knees and eyes gently closed.
2. Repeat the mantra Sa Ta Na Ma. As you chant each sound, touch your thumb to your index, middle, ring and little finger in sequence.
3. Follow the 12-minute rhythm:
   
   • 2 minutes chanting aloud
   • 2 minutes whispering
   • 4 minutes silently repeating the mantra
   • 2 minutes whispering
   • 2 minutes chanting aloud
     
4. Finish gently. Take a deep breath, relax your hands and sit quietly for a moment.

The beauty of this practice lies in its consistency. Start with 12 minutes a day and notice how your experience develops over time.

Sometimes, the smallest daily practices can create the most meaningful changes.

A Bridge Between Science and Tradition

The vagus nerve is a meeting point of medical research and ancient yogic wisdom. Modern science is beginning to explore what Kundalini Yoga has long taught: through breath, sound and awareness, we can influence the nervous system and support balance in both body and mind. In a time of increasing stress and mental health challenges, the practices of Kundalini Yoga offer valuable tools for navigating modern life.

References

1. WHO. Depression and Other Common Mental Disorders: Global Health Estimates. 2017.
2. WHO. Depression Fact Sheet. link
3. Russo SJ, Nestler EJ. Pathogenesis of depression: Insights from human and rodent studies. Neuroscience. 2016;321:138-62.
4. Rosas-Ballina M, et al. Acetylcholine-synthesizing T cells relay neural signals in a vagus nerve circuit. Science. 2011.
5. Breit S, Kupferberg A, Rogler G, Hasler G. Vagus nerve as modulator of the brain–gut axis in psychiatric and inflammatory disorders. Front Psychiatry. 2018;9:44.
6. Ben-Menachem E. Vagus-nerve stimulation for the treatment of epilepsy. Lancet Neurology. 2002;1(8):477–82.
7. Henry TR, et al. Brain blood-flow alterations induced by vagus nerve stimulation in partial epilepsy. Epilepsia. 2004;45(9):1064–70.
8. Pruessner JC, et al. Deactivation of the limbic system during acute psychosocial stress. Biological Psychiatry. 2008;63(2):234–40.
9. Sharma A, et al. A Breathing-Based Meditation Intervention for Patients with Major Depressive Disorder. J Clin Psychiatry. 2017;78(1):e59–e63.
10. 3HO. Questions and Answers about Chanting. link
11. Kalyani BG, et al. Neurohemodynamic correlates of ‘OM’ chanting: A pilot fMRI study. Int J Yoga. 2011;4(1):3–6.