Fig. 1High density EEG of anterior and posterior spindles. Examples of raw traces of HD-EEG (left) and filtered data (right, 8~18 Hz zero-phase band-pass filter) during (A) anterior and (B) posterior spindle activities. The letters indicate the electrode position as defined in
. The topographies of averaged powers of band-pass filtered data are presented on the cortical surface of MRI for the (C) anterior and (D) posterior spindle activities. The red bar indicates spindle period.
