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Time–frequency power spectra of LFP signals recorded during the orthogonal task. A, Results for Monkey G. First row, Time–frequency maps of power relative to baseline (−200 to 0 ms). We used a base 10 logarithmic color scale to give power suppression (values <1) equal contrast as enhancement (values >1). Second row, AIs calculated for separate frequency bands (same conventions as in Fig. 4). B, Results for Monkey D (same conventions as in A).
