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  • Writer's pictureDr. CK Bray

Understanding the Vagus Nerve: Your Body's Superhighway

view of person's back from the waist up with lights running up their spine and branching out like a nervous system
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The Vagus Nerve has hit the spotlight. You are hearing about it more, but you may wonder what it is and how it works. I have the executive summary for you!


The vagus nerve, the longest cranial nerve, is pivotal in the parasympathetic nervous system, commonly known as the "rest and digest" system. Originating in the brainstem and extending to the colon, this mixed nerve affects nearly every vital organ system in the body, including the heart, lungs, and digestive tract.

Why the Vagus Nerve Is Crucial

The vagus nerve is essential for maintaining bodily equilibrium, or homeostasis, by managing functions such as:

  • Heart Rate: It helps slow an accelerated heart rate and reduces high blood pressure.

  • Digestion: It facilitates the movement of food through the gastrointestinal tract and assists in the secretion of digestive enzymes for optimal nutrient uptake.

  • Respiration: It ensures steady breathing patterns.

  • Inflammatory Response: Through the cholinergic anti-inflammatory pathway, it can mitigate excessive inflammation, aiding immune system balance.

  • Mental Health and Well-Being: As a key component of the gut-brain axis, it transmits neurochemicals that affect mood, anxiety levels, and stress resilience.

  • Reflex Actions: It governs reflexes such as coughing and sneezing.

Reasons to Activate the Vagus Nerve

Activating the vagus nerve is beneficial for several physiological and psychological reasons based on its central role in the parasympathetic nervous system. Here are the top five reasons, supported by research from leading neuroscientists, why stimulation of the vagus nerve is advantageous:

  1. Regulation of Stress and Anxiety: The vagus nerve is critical to the body’s relaxation response. Its stimulation can lower cortisol levels and reduce the symptoms of stress and anxiety. Neuroscientific studies show that a higher vagal tone (a measure of the health and functioning of the vagus nerve) is associated with better emotional regulation capabilities.

  2. Enhanced Digestive Function: The vagus nerve controls various digestive functions, including the movement of muscles that churn and propel food through the GI tract, the release of digestive enzymes, and the function of digestive sphincters. Activation of the vagus nerve can help improve digestion and nutrient absorption and address issues such as constipation and irritable bowel syndrome.

  3. Improved Heart Health: The vagus nerve helps regulate heart rate and blood pressure. Stimulating the vagus nerve can decrease heart rate and reduce the risk of cardiovascular diseases. This is particularly important in managing conditions like heart arrhythmias and hypertension.

  4. Anti-inflammatory Effects: The vagus nerve controls the body’s inflammatory response. This is mediated through the cholinergic anti-inflammatory pathway, where the nerve inhibits the release of pro-inflammatory cytokines. This mechanism is being studied for its potential in treating inflammatory and autoimmune diseases, making vagus nerve stimulation a promising therapeutic strategy.

  5. Mood Improvement and Depression Management: The vagus nerve is activated, influencing the production and release of various neurotransmitters, including serotonin and dopamine, which play significant roles in mood regulation. Vagus nerve stimulation (VNS) is an approved treatment for depression in many countries, offering benefits to patients who do not respond to traditional pharmacological treatments.

Top 7 Methods to Activate Your Vagus Nerve

Activating your vagus nerve can boost your overall well-being and recovery:

  1. Cold Exposure: Engage the mammalian diving reflex by turning your shower to the coldest setting for 30-60 seconds, swimming in cold water, or splashing your face with cold water.

  2. Deep breathing: Practices like the 4-7-8 technique or belly breathing, which emphasizes a longer exhalation, help stimulate the vagus nerve by pressing the diaphragm against the internal organs.

  3. Gargling: Regularly gargling water activates the pharyngeal muscles connected to the vagus nerve, enhancing its function.

  4. Singing and Humming: Vocal activities stimulate the laryngeal branches of the vagus nerve, enhancing vagal tone.

  5. Laughing: The act of laughing, involving rhythmic diaphragmatic movements, directly stimulates the vagus nerve.

  6. Socializing: Positive social interactions often release oxytocin and stimulate the vagus nerve.

  7. Technology: Devices like the Apollo Neuro wearable utilize gentle vibrations that mimic natural heart-lung interactions during deep breathing, promoting a parasympathetic response and improving vagal tone.

Incorporating these techniques into your routine can significantly enhance your body's natural ability to manage stress and maintain balance.

Activating the vagus nerve can lead to substantial improvements in physical health, emotional well-being, and overall quality of life, which is why it's a focal point in medical research and wellness-oriented practices. Try it out this week and let me know how it works.




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