Stimuli, experimental set-up, rTMS sites and experimental timeline. (a) Stimuli. For each meaningful gesture, two matched meaningless gestures were created (b) Experimental set-up. Coloured dots indicate the location of motion trackers. The tracking box was placed next to the table, and the actor's actions were cued through images displayed on a computer screen that was not observable to the imitator. (c) 95% confidence ellipsoids for the rTMS target sites shown on a representative participant's brain. (d) Experimental timeline and stimulation onset times. Orange, observation; indigo, imitation.