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1、1,The science of sleep,2,Whats 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?,3,We hav
2、e to sleep because it is essential to maintaining normal levels of cognitive skills,such as speech,memory,innovative and flexible thinking.,Why do we sleep?,4,What would happen if we didnt sleep?,With continued lack of sufficient sleep,the part of the brain that controls language,menmery,planning an
3、d 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,itll arouse disorders such as sleep apnoea and the risk of obesity.,5,What happens when we sleep?,6,Non-REM sleep,7
4、,8,The first rapid eye movement(REM)period usually begins about 70 to 90 minutes after we fall asleep.We have around three to five REM episodes a night.,REM sleep,9,People like to sleep anywhere between 5 and 11 hours,with the average being 7.75 hours.,How much sleep is required?,10,A hard nights sleep,11,Sleep tips and advice,12,Thanks for your watching!,
