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Why
do
we
sleep ?
• We have to sleep because it is essential to maintaining normal levels of cognitive skills , such as speech, memory, innovative and flexible thinking .
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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 were entirely free to plan your day — at what time would you get up and go to bed?
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Thanks for your watching !
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WHAT WOULD HAPPEN 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.
• 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.
• We have around three to five REM episodes a night.
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HOW MUCH SLEEP IS REQUIRED?
People like to sleep anywhere between 5 and 11 hours, with the average being 7.75 hours.
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A HARD NIGHT'S SLEEP
apnoea
Snoring
disorder s
insomni a
Restless leg syndrome
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SLEEP TIPS AND ADVICE
Avoid coffeine Relax mind
Exercise regularly
advice
Avoid alcohol
Species Python巨蟒 Tiger Cat Chimpanzee黑猩猩 Average total sleep time per day 18 hrs 15.8 hrs 12.1 hrs 9.7 hrs
Sheep
African elephant Giraffe长颈鹿
3.8 hrs
3.3 hrs 1.9 hr
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What happens when we sleep?5来自NON-REM SLEEP
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REM SLEEP
•
The first rapid eye movement (REM) period usually begins about 70 to 90 minutes after we fall asleep.