Flexible fibers (IMAGE) Massachusetts Institute of Technology Caption These flexible fibers, which are embedded with sensors and light sources, can be used to manipulate and monitor the connections between the brain and the digestive tract Credit MIT Usage Restrictions Credit must be given to the creator. No derivatives or adaptations of the work are permitted. License CC BY-ND 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.