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Jul 30, 2019 · Tickling the ear with a small electric current could rebalance the nervous system in over-55s and help them age more healthily, research suggests. Stimulation of the vagus nerve, which...
Jul 30, 2019 · The good news: Their research suggests that stimulating the vagus nerve using a tVNS electrical device attached to the tragus region of the outer ear helps to rebalance the autonomic nervous...
- Overview
- 2-week therapy improves sleep and mood
- Therapy may ‘make a big difference’
New research suggests that using controlled electric currents to stimulate certain parts of the ear could readjust the body’s metabolic balance, thus reducing the risk of age related health problems.
Vagus nerve stimulation is a practice that has lately gained a lot of attention from medical researchers.
The vagus nerve is the longest of the nerves that connect the brain with other parts of the body. It provides a direct link between the brain and the gut, and it also interacts with the parasympathetic nervous system.
The parasympathetic nervous system and the sympathetic nervous system together make up the autonomic nervous system, which regulates automatic bodily functions, such as breathing and heart rate.
For these reasons, researchers have looked into using vagus nerve stimulation to support health by reducing inflammation, improving blood pressure, and even fighting anxiety.
Vagus nerve stimulation often requires surgical intervention, in which doctors implant small electrodes in different regions of the body — usually the neck — so that they can deliver the electric stimuli.
The researchers developed a therapy that they call “transcutaneous vagus nerve stimulation,” which works by delivering small electrical stimuli to the vagus nerve through its branch in the outer ear skin.
In their study paper — which appears in the journal Aging — the investigators explain that as an individual ages, their parasympathetic and sympathetic nervous systems become imbalanced, with one starting to be more active than the other. This imbalance, they say, contributes to a greater vulnerability to health problems later in life.
The current research involved three different studies, all of which recruited participants aged 55 years and above who had no hypertension (high blood pressure), heart disease, diabetes, or epilepsy at baseline. In the first study, a group of 14 participants received one session of transcutaneous vagus nerve stimulation and one session of simulated nerve stimulation.
For the second study, the researchers worked with 51 participants who agreed to undertake only one session of transcutaneous vagus nerve stimulation. Finally, in the third study, 29 participants received vagus nerve stimulation daily for 2 weeks.
The first two studies allowed the researchers to define response rates in participants, giving them a more in-depth look at how vagus nerve stimulation via the ear would affect health.
The team found that the 2-week therapy helped boost parasympathetic nervous system activity while reducing sympathetic nervous system activity, thus improving the balance of autonomic nervous system function.
The team adds that improving autonomic nervous system balance could even help lower mortality risk and may reduce the need for drugs or medical care because it lowers a person’s chance of developing age related diseases.
Moreover, the researchers observed that the participants who had the greatest autonomic nervous system imbalance at baseline benefited the most from the ear “tickling” therapy, as they saw the most significant improvements in well-being.
The next steps from here, the team says, are to find out which people are most likely to benefit from transcutaneous vagus nerve stimulation and to see how this form of therapy might improve different aspects of health later in life.
“We believe this stimulation can make a big difference to people’s lives, and we’re now hoping to conduct further studies to see if [transcutaneous vagus nerve stimulation] can benefit multiple disorders.”
Cough (rare and due to stimulation of the auricular branch of the vagus nerve by pressure from impacted earwax). Identify factors that may complicate/modify earwax removal, for example immunosuppressive illnesses (such as HIV, malignancy) and diabetes.
Transcutaneous stimulation of the external ear is thought to recruit afferents of the auricular vagus nerve, providing a means to activate noradrenergic pathways in the central nervous system.
Oct 4, 2024 · Vagus nerve stimulation (VNS) is emerging as a unique and potent intervention, particularly within neurology and psychiatry. The clinical value of VNS continues to grow, while the development of noninvasive options promises to change a landscape that is already quickly evolving.
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Feb 5, 2024 · A newly published study from the University of Oklahoma College of Medicine at OU Health Sciences shows that stimulating the body’s longest nerve through a clip on the ear significantly lessens the woozy symptoms of POTS, or postural tachycardia syndrome.
