Figure 4.

Referencing scheme comparison across SDEs and gray matter located sEEGs. Average FWHM was calculated and plotted for each patient for SDE (A, B; n = 18 patients) and sEEG (C–E; n = 47 patients) electrode pairs in each frequency range of interest. For SDE electrode pairs (1842 electrodes; 37,272 electrode pairs), average FWHM was compared using either CAR (A) or low-power CAR scheme (B). For gray matter located sEEG electrode pairs (2916 electrodes; 47,522 electrode pairs), average FWHM was compared using either CAR (C), white matter (D), or bipolar referencing schemes (E). Frequency ranges of interest: θ (4–8 Hz), α (8–13 Hz), β (13–30 Hz), NBG (30–60 Hz), BHG (70–150 Hz). NBG, narrowband γ; BHG, broadband high γ.