Scatter plots of the correlation between the modulations in left SI with the strength of the illusion (mean of questions 1 to 4, which indicate the illusion).

<p>The y-axis depicts the cortical distance between D5 and D2. Left part of the picture shows the scatter plots for synchronous stimulation, right side for asynchronous stimulation (control condition). The upper part depicts scatterplots for those subjects who felt the illusion, below the scatter plots for all subjects are shown. The data show significant correlations of the strength of the illusion with reduced cortical distances in SI (meaning a shift to posterior for D2) during synchronous stimulation. Thus, the stronger the participants felt the illusion, the more the source of D2 shifted towards posterior. In contrast, when stimulating the rubber hand asynchronously (right part of the picture), data analysis between illusion scores and modulation in SI revealed no significant correlations.