To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2 A control trial (control 2) where the plantaris muscle is present, but not stimulated thus is allowed to generate passive force in response to stretch. In vitro virtual reality: an anatomically explicit musculoskeletal simulation powered by in vitro muscle using closed-loop tissue–software interaction Christopher T. Richards, and Enrico A. Eberhard Journal of Experimental Biology 2020. 223:None-None; doi: 10.1242/jeb.210054 Download Original Video