Figure 4.

Alpha/beta power during memory retrieval. (A) Alpha/beta power decreases are typically more pronounced during recognition of old items (hits), compared to correctly identified new items (correct rejections). (B) Beta power during retrieval of positions (left) and objects (right) is shown. Black colors denote the difference in relative power decreases (ERD) between a condition in which two items (Fan1) or four items (Fan3) were recalled. The topographies on the lower left side denote the electrode positions showing a significant difference between the two Fan conditions. Note the different topographies between recall of positions and recall of objects. Figure reproduced with permission from Khader and Rösler (2011).