• Sleep deprivation not only has a major impact on cognitive functioning , but also on emotional and physical health. Moreover , it’ll arouse disorders such as sleep apnoea and the risk of obesity.
Species Python巨蟒
Average total sleep time per day
18 hrs
Tiger
15.8 hrs
Cat
12.1 hrs
Chimpanzee黑猩猩
9.7 hrs
Sheep
3.8 hrs
African elephant
3.3 hrs
Giraffe长颈鹿
1.9 hr
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• The first rapid eye movement (REM) period usually begins about 70 to 90 minutes after we fall asleep.
levels of cognitive sech, memory, innovative
and flexible thinking .
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大•学W英it语h c1o0n分tin钟uepdrelascekntaoftiosnufficient sleep, the
part of the brain that controls language, menmery, planning and sense of time is severely affected, practically shutting down.
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Thanks for your watching !
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大学英语10分钟presentation
• Do you consider yourself a morning person or an evening person ?
• At what time of day do you feel at your best? • Considering only your own "feeling best" rhythm, if you
• We have around three to five REM episodes a night.
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大学英语10分钟presentation
People like to sleep anywhere between 5 and 11 hours, with the average being 7.75 hours.
were entirely free to plan your day — at what time would you get up and go to bed?
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•
We have to sleep because it
is essential to maintaining normal