Computational protocol: Combining EEG and eye tracking: identification, characterization, and correction of eye movement artifacts in electroencephalographic data

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Protocol publication

[…] All data were preprocessed and analyzed in Matlab (Mathworks) and using FieldTrip (Oostenveld et al., ) and EEGLAB (Delorme and Makeig, ).EEG data were down-sampled to 500 Hz in order to match the sampling rate of the eye data and low-pass filtered at 100 Hz. Eye- and EEG data were then aligned by cutting them into trials according to the triggers that were simultaneously sent to both, the EEG and the eye tracking system. We visually inspected the EEG data and removed trials containing high amplitude noise, as it typically arises from muscle activity related to larger body movements, as well as blinks and other easily identifiable confounds such as sudden electrode drifts and jumps. Trials containing saccade-related artifacts were not excluded from analysis unless (1) they were not related to the task and exceeded 2° of visual angle in the saccade condition or 1° during fixation trials, (2) there was no stable fixation within 400 ms after the cue, or (3) they were not located in a window of 2° around the center of the stimulus.Where explicitly stated in the results section, the EEG data were re-referenced to the average activity of the 61 scalp electrodes. […]

Pipeline specifications

Software tools FieldTrip, EEGLAB
Application Clinical electrophysiology
Organisms Homo sapiens
Diseases Ocular Motility Disorders