Figure 2

Grand mean time-frequency representations of spectral power corresponding to the stimulus onset time window (left) and the change onset window (right) for posterior sensor sites (inset at the upper left).
The frequency range was split such that higher frequencies are illustrated in the upper two panels while the lower frequencies are shown below. Oscillatory power was calculated across conditions relative to the pre-cue baseline. Colors represent percentage signal change with respect to pre-cue baseline activity.