Fig. 2.

Approximated dipole localization of independent components (ICs) revealed from Adaptive mixture independent component analysis (AMICA) projected into a standard four-shell spherical head model (BESA, Germany). Dipoles are presented from A top, B sagittal and C coronal view. Dipoles marked blue are assigned to the frontal cluster (nIC = 21, subjects = 15, mean residual variance = 3.9 ± 2.7) and red dipoles are assigned to the frontocentral cluster (nIC = 21, subjects = 16, mean residual variance = 4.1 ± 2.2). Grey dipoles are assigned to clusters of functional ICs not further analyzed due to their topographical location in the brain