Fig. 4: EEG results–changes in theta and alpha oscillations.
From: Magnetic seizure therapy and electroconvulsive therapy increase aperiodic activity
Changes in theta (4–7 Hz) and alpha (7–12 Hz) oscillations in ECT (top) and MST (bottom). A Observed increase in theta oscillation power post-ECT (pre = 0.30 ± 0.15 µV2, post = 0.70 ± 0.32 µV2, t(19) = −5.65, dz = 1.55, ɑadj = 8.33 x 10−3, p = 1.90 x 10−5), inset shows scalp topography of median theta oscillation change. B Increase in theta abundance post-ECT (pre = 0.23 (0.03, 0.63), post = 0.69 (0.34, 0.91), W(21) = 35, δCliff = −0.45, ɑadj = 1.67 x 10−2, p = 5.40 x 10−3). C Power spectra from electrode F8 in a patient who received ECT showing the emergence of a theta oscillation and a decrease in alpha oscillation power post-ECT. D Decrease in alpha oscillation power post-ECT (pre = 1.32 ± 0.49 µV2, post = 0.99 ± 0.39 µV2, t(21) = 3.33, dz = 0.78, ɑadj = 1.25 × 10−2, p = 3.20 x 10−3), inset shows scalp topography of median alpha oscillation power change. E Decrease in alpha abundance post-ECT (pre = 1.0 (1, 1), post = 1.0 (0.94, 1), W(21) = 42 δCliff = 0.35, ɑadj = 2.50 x 10−2, p = 0.020). F Increase in theta oscillation power post-MST (pre = 0.35 (0.14, 0.42) µV2, post = 0.53 (0.44, 0.82) µV2, W(17) = 3.0, δCliff = −0.97, ɑadj = 6.25 x 10−3, p = 3.80 x 10−5), inset shows scalp topography of median theta oscillation power change. G No significant change in theta abundance (pre = 0.39(0.07, 0.98), post = 0.68(0.21, 0.95), W(21) = 47, δCliff = −0.34, ɑadj = 1.00 × 10−2, p = 0.02). H Power spectra from electrode F8 in a patient who received MST showing the emergence of a theta oscillation and a decrease in alpha oscillation power post-MST. I There is no significant change in alpha oscillation power post-MST (pre = 1.19 ± 0.44 µV2, post = 1.13 ± 0.37 µV2, t(21) = 0.88, dz = 0.15, ɑadj = 2.50 x 10−2, p = 0.39), inset shows scalp topography of median change in alpha oscillation power. J No significant change in alpha abundance post-MST (pre = 1.0 (1.0, 1.0), post = 1.0 (1.0, 1.0), W(21) = 2.0, δCliff = 0.18, ɑadj = 1.67 ×10−2, p = 0.18).
