What Is the Vagus Nerve?

The vagus nerve is the longest cranial nerve, connecting the brain to the heart, lungs, gut, and other organs. It carries most of the body's parasympathetic 'rest and digest' signals and plays a major role in calming the nervous system after stress.

Educational content only - not medical advice. In a crisis, call or text 988 (US) or your local emergency number. See crisis resources.