(One-column.) Example of two-FNC mixing from subject 3, during auditory word repetition. A: The spatial composition of the mixed FNC (right) is a combination of the most prominent interactions from each of the constituent FNCs. B: As a result, its temporal profile (green) is, broadly, the sum of the profiles of the two constituents. Based on our selection criteria, the summed (right) FNC would be excluded from analysis.