Figure 2.

IED occurrence decreases during word presentation compared with periods when the screen is blank. During the encoding phase of the free recall task, subjects were presented with a series of words to remember, with each word separated by a brief gap in which the screen was blank. (A) The occurrence of IEDs was analyzed by cortical region during the gap and word periods. Regions in which we recorded from fewer than 15 subjects are shown in dark gray. Areas that were analyzed but had no significant change in IED rate are shown in white. All other regions are significant at P < 0.05. More intense colors indicate a larger effect size. (B) We also grouped regions by lobe. IED occurred less often in all lobes while a word was onscreen.