Source montages are used to transform the EEG into the activities of the different brain regions. This reduces the wide-spread propagation seen at the scalp and helps to identify and lateralize focal brain activities immediately.
With one click on the EEG signals, 3D maps are displayed. By covering the whole head, widespread dipole fields, e.g. from basal and polar temporal cortex, can be readily recognized.
Spectral analysis over the whole EEG using density spectral arrays (DSA) can be rapidly performed and used to identify lateralized periodic activities, such as seizures. By using source montages an optimal separation of both hemispheres and different brain regions can be achieved. This helps to identify abnormal focal EEG patterns.