FIGURE 11.

Comparison of average PSDs for all 4 individual sensors in BL and FP data sets. (A) Average PSDs for each sensor in BL data set compared to average PSDs for each sensor in FP. Individual FP sensor PSDs present suppression of frequencies visually evaluated to be between 12 and 20 Hz, partially coinciding with beta band (15–25 Hz) and particularly on frontal sensors AF7 and AF8. Additionally, alpha band (8–12 Hz) shows higher dB/Hz for BL compared to FP. (B) Average PSDs for each sensor in NFP data set compared to average PSDs for each sensor in FP. Smaller suppressions are noticeable for NFP PSD, for beta band. Differences also appear to be present in alpha band. On both (A,B), differences between BL and FP (A) and FP and NFP (B) for confidence intervals (C.I.) on 90% of data are shown in the bottom of each graph; CI difference graphs are colored to correspond with the curves they describe. A black horizontal line shows where statistical difference was measured.