Figure 2: Resting-state EEG alpha oscillations for patients and controls. Group averages of electrode-level spectral power density (a, c) and eLORETA cortical current density (b, d) for resting-state EEG alpha oscillations. The scalp topographies of resting-state alpha oscillations were maximal at the parietal region for both SPD patients and healthy controls, as confirmed by electrode-level and source-level spatial distributions. For a displaying purpose, the color map limits were adjusted for each group. Data are expressed using . ; n.s.: , independent-sample -test.