Why do we sleep?
O sleep, O gentle sleep,
Nature's soft nurse, how have I frighted thee,
That thou no more wilt weigh my eyelids down
And steep my sense in forgetfulness?
William Shakespeare,
We spend about a third of our lives sleeping and however, we know very little about it. Why do we have to sleep? What happens if we don't? How does it affect us?
Watch this video and answer the questions:
By measuring the brainwaves of sleeping people
? scientists have discovered the function of sleep ? scientists can study what happens to us when we don't sleep ? scientists have discovered how to enhance our brain function by sleeping fewer hoursAfter 24 hours without sleep
? you feel better in you body ? it is as if you were drunk ? you are totally normal even to drive a carMany of us
? suffer the effects of sleep deprivation without knowing it ? sleep more than we should ? are enhancing our brain function by sleep deprivationIf you keep rats awake for several weeks,
? they live longer ? they die ? those that survive the first week go on as normalTony Wright in England
? has proved that sleep deprivation makes you feel better ? has set a new record by staying awake for 11 days ? fell asleep just when he was about to break the previous world recordThe US military
? are training their soldiers to use the parts of the brain that are more resistant to sleep ? have found the way in which migratory birds can remain completely alert on long flights ? are trying to develop ways to keep their soldiers alert without stimulants
