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. 2009 Aug 7;5(8):e1000453. doi: 10.1371/journal.pcbi.1000453

Figure 1. Comparision of conventional and generalized ERD.

Figure 1

Conventional ERD (panel A) measures the deviation of the event-related dynamics (blue solid line) from a constant baseline level (black dashed line) that is obtained as averaged power in the reference period Inline graphic. The generalized ERD (gERD), depicted in panel B, defines ERD/S in relation to a dynamic reference (black dashed) which is obtained from catch trials. The reddish and bluish areas of both panels indicate the resulting periods of ERD and ERS, respectively.