1. Fifteen days later, the bears fall into a light sleep until mid-March. 2. However, they worsen sleep quality by increasing light sleep and decreasing deep sleep. 3. Superimposed on this basic rhythm is a secondary one of light sleep in the early afternoon. 4. This is a very light sleep , where rapid eye movemements under the closed lids are common. 5. As we go into light sleep , muscles reduce in activity and there are fewer impulses going in there. 6. Nitrazepam increases the slow wave light sleep ( SWLS ) in a dose-dependent manner whilst suppressing deep sleep stages. 7. It usually occurs when the infant is sleeping deeply, but may occur with light sleep or even when awake. 8. Brotizolam increases the slow wave light sleep ( SWLS ) in a dose-dependent manner whilst suppressing deep sleep stages. 9. :It is possible for one to snore loudly enough to wake oneself; presumably mumbling might work with a particularly light sleep . 10. Using sensing technologies such as EEG electrodes or accelerometers, these alarm clocks are supposed to wake people only from light sleep . 
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