Ever heard of the phrase “gut feeling”? That’s because the health of your gut is intimately intertwined with the health of your brain. The communication between these two organs in your body is called the gut-brain axis. The vagus nerve is one of the largest nerves connecting your gut and your brain. It is also the longest and most complex of the 12 pairs of cranial nerves that emanate from the brain. Learn simple vagus nerve stimulation techniques that you can start now.