Figure 3.
Source estimation of the prestimulus alpha activity and characterization of the data using virtual sensors. a, The source estimates of the prestimulus 8–12 Hz activity for hits and misses were combined for each subject, normalized to a standard brain and then averaged. The sensorimotor mu sources are indicated (Rμ). b, The estimated source activity for hits subtracted from the misses. The posterior alpha source is indicated (Rα). Sources maps were thresholded with respect to 50% of the maximum. The colors represent NAIs. c, Hit rates for the posterior alpha source (Rα). The hit rates for the third and fourth quartile differ from the first quartile (p = 0.024 and p = 0.001, respectively). d, Hit rates were not correlated with by the 8–12 Hz activity from for the bilateral mu sources (Rμ). Error bars represent SEM.