• 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.
A hard night's sleep
10
Sleep tips and advice
11
Thanks for your watching !
12
4
What happens when we sleep?
5
Non-REM sleep
6
7
REM sleep
• The first rapid eye movement (REM) period usually begins about 70 to 90 minutes after we fall asleep.
The science of sleep
1
What’s your daily rhythm ?
• 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
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
9
levels of cognitive skills , such
as speech, memory, innovative
and flexible thin if we didn't sleep?
• With continued lack of sufficient sleep, the part of the brain that controls language, menmery, planning and sense of time is severely affected, practically shutting down.
• We have around three to five REM episodes a night.
8
How much sleep is required?
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?
2
Why do we sleep ?
•
We have to sleep because it
is essential to maintaining normal