Eye movements artifact

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  • Vertical eye movements cause deflections in Fp1 and Fp2. (see Eye blink artifact)
  • Lateral eye movements most affect lateral frontal electrodes F7 and F8
    • A left lateral eye movement, the positive pole of the eye moves toward F7 and away from F8, causing a positive wave in electrode F7 and negative wave in electrode F8
    • A right lateral eye movement cause the opposite.

Lateral eye movement seen in F7 and F8 (source)

Lateral eye movement (source) eegpedia.png