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The researchers went on to genetically engineer the DEC2 mutation into mice, showing that the animals need less sleep than their littermates. And they found thatone of the gene’s jobs is to help control levels of a brain hormone called orexin, which promotes wakefulness. Interestingly, orexin...
Short sleepers cruise by on four to six hours a night and don’t seem to suffer ill effects. Turns out they’re genetically built to require less sleep than the rest of us
After the age of 50, the average sleep time goes down to 6.5 hours a day. We need less sleep as we get older. About one in three Americans has a problem with sleep. Many of these people cannot fall asleep. The name for this problem is insomnia . Some people say, “I didn’t ...
Sleeping less can make people angry How many hours do you sleep every night? If you B just two hours of sleep a night, you may get angry, a study says. This study finds that sleeping D has something to do with people's feelings.Previous studies showed sleep loss could make people A ...
5 hours a night . We need less sleep as we get older . About one in three Americans has a problem with sleep . Many of these people cannot fall asleep . The name of this problem is insomnia . Some people say, “ I didn't sleep all night .” But that's not really true . The...
In many dogs and some people, arms, legs and facial muscles will twitch during REM sleep. Periods of sleep other than REM sleep are known as NREM (non-REM) sleep. REM sleep is when you dream. If you wake up a person during REM sleep, the person can vividly recall dreams. If you ...
We spend one third of our lives doing it, and yet, some of us never seem to be able to get enough. People all over the world don’t receive enough sleep whether it’s from a medical condition like narcolepsy, or simply not having enough time in a day. The effects of getting a goo...
Being under-tired is less common in babies and more common in toddlers, but an under-tired baby is most definitely going to fight sleep. 2. They're Overtired An overtired baby is a true disaster waiting to happen. This scenario can happen quickly, and often you won’t recognize it ...
71 If people do not have enough sleep, they may think less clearly, or sleep during the working hours._72 Generally speaking, grown-ups(年人) sleep about 7 and a half hours each night And more than60 percent of them get seven to eight hours. But 8 percent are quite happy with five...