Strain maps (IMAGE) University of California - Riverside Caption Higher strain caused by artificial ventilators (left) and less stretch when the same lung is made to breathe naturally. Credit Mona Eskandari/UCR Usage Restrictions none License Original 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.