The vagus nerve is your longest cranial nerve, connecting your brain to several of our internal organs.
It’s named after the Latin word for wandering. That’s because it starts at the brain before branching to almost every major organ in your body.
Your vagus nerve is responsible for signaling the brain to release calming neurotransmitters like acetylcholine and serotonin.
The vagus nerve is crucial for activating your relaxation response so you can “rest and digest”.