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. 2014 Oct 5;7(3):170–177. doi: 10.1016/j.slsci.2014.09.016

Fig. 2.

Fig. 2

Nocturnal PSG (10s epoch) during N2 sleep and the emergence of epileptiform EEG discharge. EEG montage (channels 12–19) shows a run of spike-and-waves during an interictal period. The electrooculogram (channels 7–8) indicates no rapid eye movements. The electrocardiogram (channel 11) is unremarkable during the interictal epileptiform EEG discharge. Channels 20–23 represent the nasal/oral airflow, chest respiratory effort, abdomen respiratory effort and O2 saturation, which do not show any sleep apnea, oxygen desaturation, or tachypnea.