Ocular artifacts in EEG and event-related potentials I: Scalp topography

  title={Ocular artifacts in EEG and event-related potentials I: Scalp topography},
  author={Otavio G. Lins and Terence W. Picton and Patrick Berg and Michael Scherg},
  journal={Brain Topography},
SummaryThe ocular artifacts that contaminate the EEG derive from the potential difference between the cornea and the fundus of the eye. This corneofundal or corneoretinal potential can be considered as an equivalent dipole with its positive pole directed toward the cornea. The cornea shows a steady DC potential of approximately +13 mV relative to the forehead. Blink potentials are caused by the eyelids sliding down over the positively charged cornea. The artifacts from eye-movements result from… 
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Blink and vertical eye movement artifact fields are quantitatively different in terms of their transmission to the scalp (Cz) EEG electrode.
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