Figure 4.

The scheme of de-noising GLM analysis (see Section General Linear Modeling and Physiological De-noising for details). In the first step physiological signals are filtered and time shifted using frequency bands and time shifts determined in the group wavelet coherence analysis as described in Section Section Wavelet Coherence Analysis and illustrated in Figure 3. In this way the set of auxiliary physiological regressors is created. This set is completed with predictors modeling cerebral activation and is used in the GLM analysis (see Section General Linear Modeling and Physiological De-noising and this figure).