Handling Artifacts in BESA

Module information
Modules	BESA Research Basic or higher
Version	5.2 or higher

Artifact correction always aims at extracting unwanted signals like EOG, EKG or external noise from the data, while leaving all brain activity of interest as undisturbed as possible. To achieve this, artifact and brain topographies must be separated. Depending on whether one is dealing with spontaneous or evoked activity, different approaches for artifact correction are appropriate. However, if the data contain only a few artifacts and a sufficient number of artifact-free trials are retained, using artifact rejection rather than correction is adviced as this avoids the distortion resulting from correction.