Figure 2.

Brain signal readout processing. (A) Brain signal (blue oscillation) consisting of ongoing (gray shading) and stimulus-evoked (colored shading) areas. (B) Ongoing brain signals determine whether or not a given stimulus is applied at that moment based on a preceding window of data, termed “trigger function.” (C) Stimulus parameters and trigger conditions are periodically reconfigured depending on a brain readout that may be different from the readout used for (B), termed “update function.”