Fig. 7.

Elbow angle. a Waveforms of elbow angles of intact and affected arms. b Similarity between elbow angles of intact and affected arms. c Average of all participants’ similarities between elbow angles of intact and affected arms. In five out of six participants (excluding P6), similarities (cross-correlation function between intact arm and affected arm at time lag = 0) under tactile feedback condition were higher than those under no tactile feedback condition with p = 0.09. Similarity of P5 was not calculated due to lack of an affected arm (amputee). Error bars indicate standard deviations of similarities evaluated several times. No error bar means that a similarity was evaluated only once