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EEG data preprocessing

MZ Maxciel Zortea
GB Gerardo Beltran
RA Rael Lopes Alves
PV Paul Vicuña
IT Iraci L. S. Torres
FF Felipe Fregni
WC Wolnei Caumo
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EEG data were preprocessed using EEGLAB, an open-source toolbox running under the MATLAB environment (The MathWorks Inc., Natick, Massachusetts, United States). Continuous EEG data were band-pass filtered (1–45 Hz) using a Hamming finite impulse response filter (filter order: 3300; transition band width: 1 Hz; cutoff frequencies: 0.5–45.5 Hz). Then, Automatic artifact detection on epoched data: epochs with absolute threshold > or < 100uV were marked for exclusion. Channels with more than 40% epochs excluded by this criterion were interpolated. Frequency-domain data were obtained using the Welch method with a 500-point moving window.

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