Fig. 3.

Polygraphic traces illustrating examples of the EEG and EMG recorded during sleep and wake states in the giant Zambian mole rat (F. mechowii). Active wake was characterized by low-amplitude, high-frequency EEG and high-amplitude EMG. NREM was characterized by high-amplitude, low-frequency EEG and low-amplitude EMG. REM sleep was characterized by low-amplitude, high-frequency EEG (similar to that seen in waking) and low-amplitude EMG that contained large, high-amplitude infrequent spikes (indicative of muscle twitches and jerks).