The vagus nerve is actually two cranial nerves that extend from the brain stem and connect down to the viscera. Sometimes this nerve is referred to as cranial nerve X, the 10 th cranial nerve or the wandering nerve.These nerves are used to send a variety of signals throughout the body, but will also transfer signals back to the brain.The vagus nerve is also known for wandering through the body, weaving through the abdomen and branching into other nerves that extend through the limbs and organs.agus nerve disorders are basically broken down into two categories. There are the disorders that are caused by a nerve that is underactive or not functioning properly and there are those that are caused by your vagus nerve overacting to the stimuli it receives.