Relative power spectral density in dB, for frequencies 0–50 Hz.

<p>Power spectra in the DMN regions with gamma decrease and the non-DMN regions in all patients comparing 1 s epochs at the center of IED to baseline. Blue trace is the most medial, followed laterally by the green and red traces. S1–S6 relates to patients 1–6. Note the power increase in frequencies <30 Hz in all DMN regions with gamma decrease, but only in 2/10 non-DMN locations: Temporal cortex in patient 5 shows increase in low frequencies, secondary to propagation of epileptic activity (Fig. 1B), and LOF contacts of patient 6 also due to propagation of IEDs originating from left SMA (not shown). Comparing Fig. 4 and 5 shows an inverse relationship between the decrease in gamma and the increase in the lower frequencies in many DMN nodes: contacts that showed more gamma decrease also had more increase in lower frequencies: For examples, compare the responses in L PCC in patient 4 and L P-C in patient 5.