To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S4. Activation of two half-sarcomeres from two adjacent sarcomeres. Activation of two half-sarcomeres by positioning the microperfusion at the Z disk. Movie was accelerated by 5×. Microfluidic perfusion shows intersarcomere dynamics within single skeletal muscle myofibrils Felipe de Souza Leite, Fabio C. Minozzo, David Altman, and Dilson E. Rassier PNAS. 2017. 114:8794-8799 DOI: 10.1073/pnas.1700615114 Download Original Video Browse All Videos »