Resting data were collected in one-minute EEG blocks, as were data during each DFA expression. Each one-minute block was then epoched into 117 2.048 epochs, overlapping by 1.5 seconds to compensate for the minimal weight applied to the end of the epoch by the use of the Hamming window function. Following windowing, a Fast Fourier Transform (FFT) was applied to all artifact-free epochs. For each state emotion facial expression and all eight minutes of each resting session, total alpha power (8–13 Hz) and EMG power (70–90 Hz) were then extracted from the power spectrum. An asymmetry score was then calculated for total alpha power by subtracting the natural log transformed scores (i.e., ln[Right] – ln[Left]) for each homologous left and right pair (FP1 & FP2, AF3 & AF4, F7 & F8, F5 & F6, F3 & F4, F1 & F2, FT7 & FT8, FC5 & FC6, FC3 & FC4, FC1 & FC2, T7 & T8, C7 & C6, C3 & C4, C1 & C2, TP7 & TP8, CP5 & CP6, CP3 & CP4, CP1 & CP2, P7 & P8, P5
