TENS Machine (IMAGE) University of Leeds Caption This image depicts a a TENS machine being used to simulate the vagus nerve. Credit (C) University of Leeds Usage Restrictions Embargoed until Embargoed until 00:01 hours UK time August 20 2014 License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.