Correlation of the intensity of activation between the IC and other cortices.

<p><b><i>A</i></b>. An example of the correlation between the IC and the PFC in the Letter G-V session. A significant correlation was observed (R = 0.46, <i>P</i><0.001, Pearson's correlation coefficient test). <b><i>B</i></b>. An example of the correlation between the IC and the visual cortex in the Letter G-V session of the same participant as shown in <b><i>A</i></b>. No significant correlation was observed (R = −0.05, <i>P</i>>0.1, Pearson's correlation coefficient test). <b><i>C</i></b>. Summary of correlation coefficients in four participants who exhibited the activation in the PFC and IC in the right hemisphere in the Letter G-V session.