sites. Bipolar electrode pairs were derived to reduce volume conduction effects, and 27 representative coherence pairs were selected based on previous EEG coherence work in COGA (Meyers et al., 2023). Magnitude squared coherence was calculated from power spectral values derived from Fourier Conventional Fourier transform methods (Nunez et al., 1997). Coherence measures were generated between bipolar pairs at the following frequency bands: theta (3–7 Hz), alpha (7–12 Hz), beta (12–28 Hz).
