High gamma and beta power correlations after feedback. A, Temporal distribution of significant power correlations for search trials. For 60–100 Hz, we observed in the search period only a tendency for early ACC power to correlate with later LPFC power. B, Percentage of ACC/LPFC simultaneous recordings with gamma power correlation after INC, CO1, and COR in at least one 300 ms interval from −300 ms to 1100 ms (see Materials and Methods for details). C, Percentage of ACC/LPFC simultaneous recordings with beta power correlation after INC, CO1, and COR in at least one 500 ms interval from −500 ms to 1000 ms (see Materials and Methods for details). We observed more frequent correlations in the repetition period than in the search period.