As previously observed (29), the spectral loadings of the low-alpha/theta factor extend below the conventional 8 Hz border into theta. Consequently, conventional qEEG measures based on standard frequency band cutoffs would unjustifiably split the factor in two, just below its peak (Fig. 1A; see also Figures S4 and S5 in the Supplement). For this reason, some differences reported here between treatment responders and nonresponders might have previously been attributed to theta activity.
