PMC4308090_01
EEG (bipolar montage) during the awake state with eyes open.
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PMC4308090_01_gr1.jpg
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Fig. 1 (bipolar montage) and Fig. 2 (average reference montage of the same epoch) illustrate the EEG during the awake state with eyes open.
The EEG (bipolar montage) during behaviorally defined sleep.
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PMC4308090_01_gr3.jpg
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The EEG during behaviorally defined sleep (eyes closed, no movement) is shown in Fig. 3 (bipolar montage) and Fig. 4 (average reference montage of the same epoch), demonstrating a discontinuous background with a BS pattern consisting of alternating periods of diffuse background attenuation and bursts of fast activity with embedded spikes.