Figure 4.

Induced oscillatory activity during WM maintenance. Induced alpha activity (top) at posterior electrodes and gamma activity (bottom) at anterior electrodes during the maintenance following the offset of the first sample stimulus for WM load 1 (left), the offset of the second stimulus for WM load 2 (center), and the offset of the third stimulus for WM load 3 (right) are shown for the early delay (500–2500 ms) and the late delay (2500–4500 ms) periods for controls (NC, blue, top row) and patients with EOS (red, middle row) and the group comparison in the frequency range of interest (bottom row). On the far right, mean amplitudes in response to WM load 1, 2, or 3 during early and late delay are shown for the anterior and posterior ROI for patients (EOS, red) and controls (NC, blue). Error bars represent SE.