Figure 3
Theta oscillations during spatial working memory performance. Significant increases in theta (4–8 Hz) activity were observed in the left dorsolateral prefrontal cortex (DLPFC; top left) and right inferior frontal gyrus (IFG; top right) shortly after the onset of the encoding stimulus (p < 1−6, cluster-corrected). Time courses of theta activity from the peak voxel of each region revealed a transient increase in theta activity following the onset of the encoding grid, with a more substantial increase seen in the right IFG (bottom right). A transient increase in theta activity was also found at the beginning of the maintenance phase, but in this case the response was much stronger in the left DLPFC (bottom left).
