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12-month warranty
Same day dispatch
Professionally endorsed

Vegas Nerve: Anatomy, Functions & Using TENS Devices for Stimulation

A woman touching the back of her neck with both hands

The longest nerve in the body is the vagus or vegas nerve. It includes the right and left vagus nerves, with the sensory and motor as its two main branches. The nerve has many functions that impact the overall well-being of people. Some examples are digestive tract function, heart rate regulation, respiratory function, and control of inflammation. Vagus nerve stimulation helps treat various conditions, such as anxiety and treatment-resistant depression. People can utilise Transcutaneous Electrical Nerve Stimulation (TENS) for this.

The vagus nerve travels along the brainstem, neck, chest, and abdomen. It connects abdominal organs like the stomach, intestines, and liver to the brain. This connection allows communication between the gastrointestinal tract and the brain, influencing various functions. Understanding the components surrounding this nerve can provide valuable insights into how individuals can maintain a healthy lifestyle. Thus, the following sections will present its anatomy, function, and how to use TENS for its stimulation.

Anatomy of the Vegas Nerve

Aside from being the longest nerve in the body, people should know that the vegas nerve is the 10th cranial nerve. Its anatomy is a complex network of fibres. The left and right nerves run from a part of the brain stem, neck, spinal cord, and various body organs. It plays a crucial role in the ability of the human body to rest, relax, and recover from stress.

Named after the Latin word for “wandering,” the vagus nerve gets its name due to its extensive distribution throughout the body. It is one of the 12 cranial nerves originating directly from the brain, with the vagus nerve being the only cranial nerve that extends beyond the head and neck region. It is divided into two main branches, which are the sensory and motor branches.

The sensory function carries information from the internal organs to the brain. On the other hand, the motor function is responsible for sending signals from the brain to the organs to regulate their function. This intricate system allows the vagus nerve to play a key role in maintaining homeostasis and ensuring the smooth functioning of the body.

Components and Divisions of the Vagus Nerve

  • Motor fibres – Control muscles in the throat, voice box, and soft palate, allowing swallowing, speaking, and coughing.
  • Sensory fibres – Send sensory information from the pharynx, larynx, esophageal branches, and viscera to the brain, like touch and pain.
  • Special sensory fibres – Responsible for transmitting information related to taste from the back of the tongue.
  • Parasympathetic fibres – Regulates heart rhythm, lung function, and digestive system.
  • Afferent fibres – Carry sensory information from the organ systems and tissues to the brain, allowing for internal stimuli perception.
  • Efferent fibres – Send motor signals from the brain to the organ systems and tissues, controlling their responses.

A person touching their abdomen with both hands

Functions of the Vegas Nerve

The vegas nerve is a crucial component of the autonomic nervous system, responsible for regulating various bodily functions. Its functions are diverse since it is associated with mental health and emotional regulation. The vagus nerve helps initiate the fight or flight response when the body perceives a threat or danger. It does this by an increase in heart rate, constricting blood vessels, and releasing stress hormones like adrenaline.

Additionally, the vagus nerve acts as a messenger between the brain and the heart. It sends signals to help control the heart rate and maintain healthy blood pressure. This is essential for overall cardiovascular health and stability. Also, it plays a crucial role in stimulating the release of acetylcholine, a neurotransmitter that helps slow heart rate and decrease blood pressure.

Furthermore, the vagus nerve is vital to the digestive system. The nerve sends signals to the stomach and intestines to promote digestion and control the release of digestive enzymes. Additionally, it is involved in the communication between the gastrointestinal tract and the brain, helping to regulate appetite and feelings of hunger and fullness.

Autonomic Controls

The vagus nerve plays a crucial role in the autonomic control of various bodily functions. It is an essential part of the parasympathetic nervous system. Moreover, the autonomic controls are responsible for regulating involuntary functions such as heart rate, digestion, and breathing.

The immune system also interacts with the vagus nerve through a phenomenon known as the “vagus nerve-brain axis.” This bidirectional communication pathway between the brain and immune system helps maintain homeostasis and regulate inflammatory responses. Furthermore, the vagus nerve plays a role in stress response, helping to calm the body down after a demanding event.

A TENS machine kit with a pack of gel pads and necessary information

Using TENS Devices for Vegas Nerve Stimulation

Some people need vagus nerve stimulation because the nerve regulates different bodily functions. One in-demand method of doing so is through TENS therapy. To undergo this type of electrotherapy, the user must place electrodes on the skin. Then, the device sends low-voltage electrical signals through the nerves. This results in pain relief and improved overall wellness. Stimulating the vegas nerve through TENS therapy can alleviate abdominal pain, depression, and anxiety symptoms.

Individuals can easily use TENS units at home. The device can help manage different pain issues, improve blood flow, make improvements in mood, and enhance overall well-being. Users can place the electrode pads on the neck or behind the ear for vagus nerve stimulation, as these are the areas where the nerve is most easily accessible.

While TENS therapy can be beneficial for stimulating the vagus nerve, it is crucial to consult a healthcare professional before starting any new treatment. They may conduct medical tests to ensure they are safe to administer for specific conditions. Overall, the electrical stimulation from TENS can help regulate the function of the vagus nerve.

How Does It Work?

TENS sends low-voltage electrical currents to target the vagus nerve. The electrical stimulation stops the spinal cord from transmitting pain signals to the brain. This stimulation can alter the signals sent to the brain, ultimately impacting various bodily functions.

Vagus nerve stimulation can regulate heart rate, reduce inflammation, and improve mood. The electrical pulses sent by the TENS device can also affect the release of neurotransmitters in the brain, leading to a calming effect on the body. Overall, TENS modulates the activity of the vagus nerve, which in turn has widespread effects on overall health and well-being.


People refer to the vegas nerve as the 10th and longest nerve in the body. The right and left vagus nerve are two components of the autonomic nervous system. Also, it runs from the brain stem through the neck and chest and into the abdomen. It plays a crucial role in regulating various bodily functions, including heart rate, digestion, and respiratory function. Moreover, it heavily influences the gastrointestinal tract. The nerve controls food movement through the digestive system.

Stimulating the vagus nerve using techniques such as TENS has shown potential in treating conditions like treatment-resistant depression. Using electrical impulses to activate the nerve allows TENS to help modulate the inflammatory responses. In addition, it can improve mood and overall brain function. Moreover, as further research continues to unveil the full potential of vagus nerve stimulation, it may lead to novel treatments and therapies. Those interested in buying a TENS machine may consider the iTENS from iTENS Australia.

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