30 May 2018
Vol 3, Issue 18

About The Cover

Cover image expansion

ONLINE COVER Antagonistic Actuation. Engineers have used natural muscle tissues to move robotic devices, but the tissues were limited by spontaneous shrinkage, small ranges of movement, and short lifetimes. Morimoto et al. engineered muscle tissues by stacking thin hydrogel sheets containing myoblasts, then anchored an antagonistic pair of the tissues to a flexible robotic skeleton. Actuated by electrically stimulated engineered tissues, the device achieved a joint rotation of 90°, a range of motion comparable to that of a human finger. The muscle tissues remained capable of actuation for about one week. [CREDIT: SHOJI TAKEUCHI RESEARCH GROUP/UNIVERSITY OF TOKYO]