Figure 3.

Prestimulus fMRI time courses from bilateral auditory cortex. Left, Map of activation evoked by the near-threshold stimulus (independent of percept) assessed in a group analysis. This map served as the basis for subject-by-subject definition of the auditory ROI (shown on the group's average brain; threshold height p < 0.001 uncorrected; see Materials and Methods for details). Right, In accord with our previous findings, we tested the effect of prestimulus activity at time point 0 s and found significantly higher activity preceding hits than misses (as indicated by an asterisk). Error bars indicate ±SEM.