Figure 4. Effect of Prestimulus Alpha Power on BOLD Response to Auditory Targets.

An inverse correlation between prestimulus alpha power and the BOLD response was seen throughout many posterior regions, suggesting a possible confound with underlying alpha-BOLD coupling. Results shown were per-voxel thresholded at p < 0.005 then cluster-thresholded at p < 0.05 and are displayed in radiological orientation on an MNI template brain. z coordinates are specified.