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. Author manuscript; available in PMC: 2018 May 1.
Published in final edited form as: Epilepsia. 2017 Apr 11;58(5):882–892. doi: 10.1111/epi.13735

Figure 3. Time-frequency analysis of voluntary movements unrelated to spasms did not show gamma and beta activity.

Figure 3

EEG changes associated with spontaneous voluntary movements unrelated to spasms (brief bilateral upper limb movements) in patient #1 with known etiology (global developmental delay). Sampling frequency: 200 Hz. (A) Bipolar EEG montage. LFF: 1 Hz; HFF: 70 Hz. (B) Temporally expanded trace of panel A. LFF: 0.1 Hz; HFF: off. (C) EEG of panel B filtered with LFF 53 Hz and HFF off. The trigger point for the time-frequency analysis was placed at the EMG onset in the temporally expanded trace. (D) Bipolar montage: Time frequency plots derived from 24 events (spontaneous voluntary movements unrelated to spasms). Augmentation of EMG activity was noted (marked with green arrowheads), but no beta or gamma activity was seen in EEG channels including the centroparietal electrodes.