Fig. 3: Beta and gamma bands are modulated by the symbolic distance.

Average time-series of beta (blue) and gamma (red) bands as a function of SD ± SE, shown separately for each monkey. Signals for each SD are represented using different shades of color, with dark shades indicating low SD and light shades indicating high SD. The timeline is aligned to: pair presentation (Pair ON), Go onset (GO), and Movement onset (Mov ON), and target touch (Touch). The colored blue and red lines at the bottom indicate significant differences between the SD conditions for each frequency band (permutation test, with significance p < 0.05).