Sweat Artifact in EEG

Sweat artifact produces very slow frequency oscillations less than 1 Hz, typically 0.25-0.5 Hz. This can be in many channels or localized to one area without notable field. The artifact is caused by Sodium chloride and lactic acid from the sweat that reacts with the metals of the electrodes to produce slow baseline sways. B 004 JG 24 01 04 Sweat