Flexing an Artificial Muscle (video) National Institute of Standards and Technology (NIST) Share Print E-Mail Loading video... Caption Flexing muscle: IPMC actuator bending under an applied electrical voltage. As the polarity of the 3-volt potential is switched, the actuator bends back and forth. Credit R. Moore/Virginia Polytechnic Institute and State University Usage Restrictions None Share Print E-Mail 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.