Supplemental Data S1 Self and Other in the Human Motor System

The experiment was carried out on 14 healthy subjects (mean age 246 3, 5 males, and 3 left-handed) with ethical-committee approval. Informed written consent was obtained from each subject. Subjects performed blocks with either synchronous or asynchronous visual and tactile stroking in counterbalanced order. The blocks were sep-arated by a break of about 5 min, during which the subject left the room to reduce transfer between blocks. Furthermore, the synchro-nous and asynchronous blocks were each subdivided into two phases. First, the induction phase involved 3 min of stroking to in-duce the ‘‘rubber-hand illusion’ ’ [S1], during which subjects simply looked at the experimenter’s static hand. This was followed by an experimental phase in which short epochs of stroking were unpre-dictably interleaved with action-observation trials. After an audio signal delivered via headphones to the experimenter only, the exper-imenter abducted her right index finger by using her first-dorsal in