Warm stimulation of the vagus auricular nerve (Jacobson nerve) has the effect of reducing pulse frequency, a new method of psychological relaxation?

Introduction: Research involving warm temperature stimulation of the auricular vagus nerve is still uncommon. This method is considered because using electric current on the auricular vagus nerve can cause discomfort to the subject. Both electric and warm temperature stimulation target type C sensory nerves. Therefore, to stimulate the auricular vagus nerve, we opted for warm temperature stimulation. This study aimed to determine whether warm stimulation of the auricular vagus nerve affects pulse frequency. Methods: Twenty-six participants who met the inclusion criteria had their pulse frequency measured. After that, they were asked to use an ear warmer that people usually use in four-season countries for 30 minutes, and then each participant's pulse frequency was measured after using the ear warmer. Result: The results of this study showed that the average pulse rate before using the ear warmer was 100, while the average pulse rate after using ear warmers was 91. There is a decrease in pulse after using ear warmers, with a significant value (p <0.001). Conclusion: Research suggests that ear warmers, originally designed for non-therapeutic purposes, may have therapeutic potential. Jacobson's nerve stimulation can reduce heart rate frequency, promoting physical and mental relaxation.