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. 2012 Aug 8;7(8):e42059. doi: 10.1371/journal.pone.0042059

Figure 7. The activity of various neuron groups during sleep-wake cycling.

Figure 7

In the first sleep episode, the pre-synaptic inhibition from GABA-SNr was activated at two distinct times, each for different lengths. Pre-synaptic inhibition was triggered once during the second sleep episode. In each episode, this resulted in transient REM-on and REM-off oscillations. The overall transitions between wake and sleep were still governed by the homeostatic and circadian inputs as in Fig. 4.