Figure 3.
Time-frequency plots of wavelet-power during slow oscillations. (A) Time-frequency plots of wavelet-power in a time window of ± 1.2 sec and for frequencies of 5-20 Hz around the negative peak of the SO (t = 0) in the frontal (top), central (middle), and parietal (bottom) electrode. Note, strong enhancement in < 12 Hz slow spindle wavelet-power during the transition into SO down-state most pronounced in the frontal electrode. Coloring indicates relative wavelet-power with the average power during the baseline (−1.3 to −1.2 sec) set to “1.” (B) Grand mean averages of original EEG in all 27 recording channels across all detected SOs. Averaging was performed in a time window of ± 1.2 sec with reference to the negative peak of SOs (t = 0).