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Stage N3 sleep

Stage N3 sleep
This image demonstrates a 30-second recording (Compumedics) of stage N3 sleep. Most notable are the delta waves throughout the EEG recording (background shading), maximal in the frontal leads. The top two leads represent the eyes (right and left), the next lead is the chin, then the following six leads are EEG (right and left frontal, central, and occipital), ECG with heart rate below (R-R), and the leg EMG lead.
EEG: electroencephalogram; ECG: electrocardiogram; EMG: electromyography.
Graphic 103291 Version 1.0