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. Author manuscript; available in PMC: 2023 May 1.
Published in final edited form as: Psychophysiology. 2021 Jul 20;59(5):e13901. doi: 10.1111/psyp.13901

Figure 3. Alpha power vs. broadband activity.

Figure 3.

(A) TFR of lower frequency range (5–30 Hz) showing alpha decrease (absolute change vs. baseline), in two example parietal electrodes in two different patients (upper panels) versus alpha increase in example electrode in another patient (lower panel).

(B) TFR of higher frequency range (70–150 Hz) showing high-frequency broadband increase (relative change vs. baseline; upper panels) versus no change (lower panel), for the same locations as in A.

(C) Negative relationship between alpha and broadband activity over electrodes; data for all patients combined, computed over all recording sites, showing non-linear relationship (N=1593 sites, see Figure 2A). Blue (portions of) bars reflect data from electrodes within the task-engaged channel selection (i.e., significant alpha decrease during task vs. baseline). Bins comprised 100%, 82%, 14%, 0%, and 0% of data from the selected subset, respectively.

(D) Similar as C, computed over all sites with significant task-related alpha decrease (N=621 sites, see Figure 2B).

(E) Negative relationship between alpha and broadband activity over trials; data for all patients combined, selected subset of channels only.