Alzheimer’s disease has become one of the most significant health problems in aging populations. Beginning with memory loss and gradually leading to an inability to independently manage daily life, this disease profoundly affects not only individuals but also families and healthcare systems. Globally, approximately 55–60 million people currently live with dementia, with Alzheimer’s disease accounting for the vast majority of these cases. With increased life expectancy, this number is expected to double in the coming decades. Therefore, Alzheimer’s is considered not only a medical problem but also a global public health issue with social and economic dimensions (https://www.who.int/health-topics/dementia).
For many years, medications used in the treatment of Alzheimer’s disease have primarily aimed at alleviating symptoms. Drugs such as donepezil, rivastigmine, galantamine, and memantine can provide temporary cognitive improvements in some patients. In recent years, new drugs targeting amyloid protein accumulation have been developed, yielding some promising results. However, these treatments currently have limited effectiveness, and no approach can completely stop the disease (https://pmc.ncbi.nlm.nih.gov/articles/PMC12637128/). Therefore, the scientific community is focusing on new biological mechanisms that could prevent or slow the progression of Alzheimer’s disease. One of these research areas is the vagus nerve and its effects on brain health.
The vagus nerve is one of the longest nerves originating in the brain, connecting to many organs, including the heart, lungs, and digestive system. As a major component of the parasympathetic nervous system, the vagus nerve plays a crucial role in the body’s processes of rest, repair, and healing. Many processes, such as stress reduction, heart rate regulation, immune system control, and inflammation reduction, are associated with the vagus nerve. Recent research suggests that this nerve may also be linked to memory, learning, and cognitive functions.
New research indicates that vagus nerve stimulation could be a promising approach against Alzheimer’s disease and age-related memory loss. Research shows that the vagus nerve is connected to brain regions, particularly the hippocampus and learning networks, that are particularly associated with memory. Therefore, vagus nerve stimulation may support memory formation and improve cognitive performance. Experimental studies suggest that vagus nerve stimulation can facilitate learning and strengthen connections between nerve cells (https://theconversation.com/vagus-nerve-stimulation-shows-promise-as-a-way-to-counter-alzheimers-disease-and-age-related-memory-loss-269465).
One of the mechanisms playing a significant role in Alzheimer’s disease is brain inflammation. The vagus nerve has anti-inflammatory effects and can regulate the immune system. Therefore, it is thought that vagus nerve stimulation may protect brain cells by reducing chronic inflammation seen in Alzheimer’s disease. This could be an important protective mechanism not only for Alzheimer’s but also for age-related cognitive decline. Research also shows that vagus nerve stimulation can increase brain plasticity, thereby strengthening the brain’s capacity to form new connections. This can provide a significant advantage in terms of learning, memory, and cognitive flexibility (https://pmc.ncbi.nlm.nih.gov/articles/PMC11486617/).
One of the remarkable aspects of the vagus nerve is that it can be stimulated not only by medical devices but also by natural methods that can be applied in daily life. Sound production is one such method. Singing, humming, or making rhythmic sounds can have a stimulating effect on the vagus nerve. The vibrations generated by the vocal cords and throat muscles activate the parasympathetic system, producing a calming effect. This can affect not only mood but also, indirectly, cognitive functions (https://www.sciencedirect.com/science/article/abs/pii/S0031938425001738).
Similarly, yoga and meditation practices have also been associated with the vagus nerve. Slow, deep breathing, prolonged exhalation, and rhythmic sound production can increase vagal activity. Physiological changes that occur, particularly during meditation and breathing exercises, such as decreased heart rate and reduced stress hormones, are explained by vagus nerve activation (https://pmc.ncbi.nlm.nih.gov/articles/PMC3099099/).
Reading the Quran, dhikr, or similar rhythmic acts of worship are also considered interesting in this respect. The rhythmic sound production, prolonged reading, and regular breathing that occur during Quran recitation possess physiological characteristics that can stimulate the vagus nerve. Some studies show that listening to and reading the Quran can reduce stress and anxiety, regulate heart rhythm, and increase parasympathetic activity. These findings suggest that worship and rhythmic sound production may have neurophysiological effects (https://pmc.ncbi.nlm.nih.gov/articles/PMC10704108/).
Slow, deep breathing exercises are also considered an important method for activating the vagus nerve. In particular, slow inhalation and prolonged exhalation activate the parasympathetic system, leading to relaxation. In addition, research suggests that daily activities such as gargling, washing the face with cold water, social interaction, slow speech, and prayer can also increase vagal activity (https://health.clevelandclinic.org/vagus-nerve-reset).
While there is no definitive cure for Alzheimer’s disease, research into the vagus nerve and its natural stimulation is opening up a promising area. The idea that even seemingly simple activities like singing, praying, meditating, or breathing exercises can have positive effects on brain health creates a remarkable bridge between modern neuroscience and ancient human practices (https://www.vogue.com/article/vagus-nerve-stimulation).
Perhaps in the future, preventing Alzheimer’s disease and maintaining cognitive health will depend not only on medication but also on daily habits that promote breathing, sound, rhythm, and mental peace.
