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What the Vagus Nerve is? Effective Ways to Rewire Your Brain

The vagus nerve originates in the brainstem and reduces stress and anxiety levels. This little nerve greatly impacts our health, and here's how you can work it into your routine!

Rosie Ford
What the Vagus Nerve is? Effective Ways to Rewire Your Brain
Table Of Contents

The body's power system, the nervous system, is divided into the central nervous system — the brain and spinal cord — and the peripheral nervous system. The autonomic nervous system controls all the body's automatic functions, such as heart rate, digestion, respiration, and sweating. This leaves the somatic nervous system to control our voluntary muscles like we want them to.

The autonomic nervous system is then subdivided into the sympathetic nervous system, which speeds up heart rate, constricts blood vessels, and increases blood sugar; and the parasympathetic nervous system, which does the opposite by slowing down heart rate, increasing blood flow, and decreasing blood sugar and blood pressure.

Both systems are essential and work together to maintain homeostasis in the body. But, the parasympathetic nervous system, which is controlled by the vagus nerve, might be the most important.

The vagus nerve is the longest cranial nerve in the body, extending from the brainstem to the abdomen. It's sometimes called "the wandering nerve" because of its meandering path.

The vagus nerve has many functions, including controlling heart rate, digestion, and immunity. It also plays a role in communication between the brain and gut—which is why it's sometimes called "the second brain."

Recent studies have shown that stimulating the vagus nerve can help treat conditions like depression, anxiety, migraines, Alzheimer's, and dementia. It's a key player in the nervous system, and it's connected to almost every major organ in the body.

It's also unique because it's the only nerve that can send signals to the brain and receive signals from it. That two-way communication is essential for maintaining balance in the body.

Functions of Vagus Nerve

The vagus nerve is the longest cranial nerve in your body. It starts in your brainstem and runs through your neck and chest to your abdomen. This nerve controls involuntary body functions, such as heart rate and digestion. It also plays a role in your immune system and mood.

The vagus nerve comes from the Latin word for "wandering." This is because it wanders through your body, connecting your brain to many of your organs. The nerve is essential for keeping your body functioning properly. For example, it helps regulate your heart rate and blood pressure. It also helps with digestion by controlling the movement of food through your digestive tract.

The vagus nerve also plays a role in your immune system. It helps fight off infections by sending signals to your immune cells. Additionally, this nerve is involved in maintaining a healthy balance of good and bad bacteria in your gut.

The vagus nerve is also crucial for mood. It helps regulate the level of the neurotransmitter serotonin in your brain. Serotonin is a chemical that helps regulate mood, appetite, and sleep. Low levels of serotonin are linked with depression.

The vagus nerve is a critical part of your body's overall health. Therefore, it's essential to keep it healthy and to function properly.

Your Love Nerve

The vagus nerve is responsible for a variety of different emotions. It is connected to the brainstem, which controls our ability to feel fear, anger, happiness, and sadness. The vagus nerve also plays a role in social bonding and attachment. When we are around people we care about, our vagus nerve becomes more active, which makes us feel more connected to them.

When something activates our vagus nerve, it can cause us to feel various emotions. For example, if we see someone we care about in danger, our vagus nerve will cause us to feel fear. Therefore, the vagus nerve is a critical player in our emotional state and can significantly impact our feelings.

A Gut Feeling for You

The vagus nerve is also responsible for what is commonly known as the "gut feeling." This is because the vagus nerve innervates the digestive system, providing sensory information about what is going on in the gut; when you have a gut feeling about something, your vagus nerve signals to your brain that something is wrong.

This can be a warning sign from your body that you should pay attention to. Gut feelings are important to listen to, as they can often be warning signs from your body that something is not correct. If you have a gut feeling about something, paying attention to it and investigating further is essential.

Fight or Flight System

The vagus nerve is also involved in the "fight or flight" response, our body's natural reaction to stress or danger. When we perceive a threat, our sympathetic nervous system kicks into gear, releasing adrenaline and other stress hormones. This makes our heart rate spike and our blood vessels constrict, so we can have more blood and oxygen flowing to our muscles.

At the same time, our vagus nerve slows down our heart rate and dilates our blood vessels. This is known as the "vagal brake". The vagal brake is essential because it helps prevent us from going into shock when we're stressed. It also allows us to recover more quickly after a stressful event.

Vagus Nerve Stimulation

The vagus nerve is responsible for many things, including heart rate, digestion, and immune response. Stimulating this nerve can help with all of these functions. For example, the increasing vagal tone has been shown to lower blood pressure and heart rate. It can also help with digestive issues like IBS and GERD. It may improve immunity by reducing inflammation.

Vagus nerve stimulation (VNS) is a treatment for depression that involves delivering electrical impulses to the vagus nerve, which runs from the brainstem to the abdomen. The vagus nerve is part of the parasympathetic nervous system, which controls involuntary body functions like heart rate and digestion.

VNS was first approved by the FDA in 2005 for refractory epilepsy and has since shown efficacy in treating several other conditions, including depression. In VNS for depression, a device similar to a pacemaker is implanted under the skin on the chest, and leads are threaded through the chest to the vagus nerve. The device delivers electrical impulses to the vagus nerve at regular intervals, which are thought to modulate the activity of brain regions involved in mood and emotion.

VNS is considered a safe and effective treatment for depression, with a low risk of side effects. The most common side effect is temporary hoarseness of the voice due to stimulation of the recurrent laryngeal nerve, which runs alongside the vagus nerve. Other potential side effects include dizziness, headache, nausea, and sore throat.

Some of the potential benefits of vagus nerve stimulation include:

Reduced Seizure Frequency: In clinical trials, VNS has been shown to reduce seizure frequency by up to 50% in people with drug-resistant epilepsy.

Improved Mood: VNS has also been shown to be an effective treatment for depression. In one study, VNS was found to be as effective as antidepressant medication in reducing symptoms of depression.

Reduced Migraine Frequency: VNS tends to be an effective treatment for migraines and anxiety.

Improved Life Quality: People who receive VNS therapy generally experience an improved quality of life. This is likely because VNS can help reduce the symptoms of various conditions.

How to Stimulate Vagus Nerve?

You can do several things to stimulate your vagus nerve and keep it functioning properly. Some of these include:


Gargling is an effective way to stimulate the vagus nerve. The act of gargling activates the muscles in your throat, which in turn stimulate the vagus nerve.

Chewing Gum

Chewing gum is another simple way to stimulate your vagus nerve. Chewing gum activates the muscles in your jaw, stimulating the vagus nerve.

Singing or Humming

Singing or humming is a great way to stimulate your vagus nerve. The act of singing or humming uses the muscles in your throat and activates the vagus nerve.

Yoga or Meditation

Yoga and meditation are both excellent ways to stimulate your vagus nerve. These activities help to relax your body and mind, which in turn helps to stimulate the vagus nerve.

Cold Water Therapy

Cold water therapy is another excellent way to stimulate your vagus nerve. The act of immersing yourself in cold water helps to stimulate the vagus nerve.


Massage is a great way to stimulate your vagus nerve. The act of massage helps relax your body and mind, which in turn helps stimulate the vagus nerve.


Acupuncture is an excellent way to stimulate your vagus nerve. The act of acupuncture helps relax your body and mind, stimulating the vagus nerve.

Stimulating Herbs and Spices

Several herbs and spices can help stimulate your vagus nerve. These include ginger, garlic, turmeric, cumin, and fennel. These herbs and spices can be added to your food or taken in supplement form.


Probiotics are live bacteria that are beneficial for your gut health. They help promote a healthy digestive system, which may result in stimulating the vagus nerve.


1. What are some potential causes of vagus nerve damage?

Vagus nerve damage can be caused by several things, including trauma, surgery, infection, and certain medications. Additionally, conditions such as diabetes or autoimmune diseases can also lead to damage to the vagus nerve.

2. What are some of the symptoms of vagus nerve dysfunction?

Symptoms of vagus nerve dysfunction can vary depending on which part of the body is affected. For example, if the vagus nerve is damaged in the area that controls heart rate, a person may experience an irregular heartbeat or palpitations.

If the damage occurs in the section of the nerve that controls the digestive system, a person may experience nausea, vomiting, or diarrhea. Other symptoms of vagus nerve dysfunction can include difficulty swallowing, shortness of breath, and dizziness.

3. Can I strengthen my vagus nerve?

Yes, there are several things you can do to strengthen your vagus nerve. Some simple techniques include:

  • Sing or hum: The vibrations from singing or humming help stimulate the vagus nerve.
  • Yoga and meditation: These practices help promote relaxation and reduce stress, stimulating the nerve.
  • Cold exposure: Cold showers or ice baths help increase heart rate variability, which indicates vagal tone.
  • Deep breathing: Deep breathing helps activate the parasympathetic nervous system, of which the vagus nerve is a part.

4. How is vagus nerve damage diagnosed?

Diagnosing vagus nerve damage can be tricky because the symptoms mimic other conditions. It is essential to see a doctor familiar with this condition to get an accurate diagnosis. Sometimes, you may order tests such as MRI or CT scans to rule out other potential causes of the symptoms. A doctor may also order blood tests or perform a nerve conduction study to diagnose vagus nerve damage.


The vagus nerve is the longest and most complex nerve in the human body. It extends from the brainstem to the abdomen and controls many of the body's involuntary functions. The vagus nerve is responsible for the control of the digestive system, heart rate, and respiratory rate. It also plays a role in maintaining blood pressure and suppressing inflammation.

Stimulating the vagus nerve can have a wide range of health benefits. Stimulating the vagus nerve can improve heart health, relieve stress and anxiety, boost cognitive function, and even help treat depression. Several ways to stimulate the vagus nerve include yoga and meditation, deep breathing exercises, and electrical stimulation. Stimulating your vagus nerve is a great place to start if you want to improve your health and well-being.

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Rosie Ford

Rosie began her career in communications as a writer and later as a communications coordinator for renowned university of South Carolina. She is also trained in the field of article writing specially related to fitness and yoga.

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