full transcript

From the Ted Talk by Matt Walker: How caffeine and alcohol affect your sleep

Unscramble the Blue Letters


Many of us like to start the day with a cup of coffee and perhaps end the day with a glass of wine or some other kind of alloiohcc dinrk. But it turns out that these two substances, alcohol and cnfieafe, can have surprising impacts on our sleep.

[Sleeping with Science]

(Music)

Let's start with caffeine. Caffeine is in a class of drugs that we call the psychoactive sntimaltus. And everyone knows that caffeine can make them more alert. It can wake them up. But there are at least two additional, hidden features of caffeine that some people may not be aware of.

The first is the duration of action of caffeine. Caffeine, for the average adult, will have what we call a half-life of about five to six hours. What that means is that after about five to six horus 50 pneerct of that caffeine that you had is still circulating in your sstyem. What that also means is that caffeine has a quarter-life of about 10 to 12 hours. In other words, let's say that you have a cup of coffee at 2pm in the evening. It could be that almost a quarter of that caffeine is still swilling around in your brain at midnight. And as a result, it can make it harder for an individual to fall aeeslp or even stay asleep soundly throughout the night. So that's the first feature of caffeine.

Open Cloze


Many of us like to start the day with a cup of coffee and perhaps end the day with a glass of wine or some other kind of _________ _____. But it turns out that these two substances, alcohol and ________, can have surprising impacts on our sleep.

[Sleeping with Science]

(Music)

Let's start with caffeine. Caffeine is in a class of drugs that we call the psychoactive __________. And everyone knows that caffeine can make them more alert. It can wake them up. But there are at least two additional, hidden features of caffeine that some people may not be aware of.

The first is the duration of action of caffeine. Caffeine, for the average adult, will have what we call a half-life of about five to six hours. What that means is that after about five to six _____ 50 _______ of that caffeine that you had is still circulating in your ______. What that also means is that caffeine has a quarter-life of about 10 to 12 hours. In other words, let's say that you have a cup of coffee at 2pm in the evening. It could be that almost a quarter of that caffeine is still swilling around in your brain at midnight. And as a result, it can make it harder for an individual to fall ______ or even stay asleep soundly throughout the night. So that's the first feature of caffeine.

Solution


  1. system
  2. alcoholic
  3. hours
  4. caffeine
  5. percent
  6. stimulants
  7. drink
  8. asleep

Original Text


Many of us like to start the day with a cup of coffee and perhaps end the day with a glass of wine or some other kind of alcoholic drink. But it turns out that these two substances, alcohol and caffeine, can have surprising impacts on our sleep.

[Sleeping with Science]

(Music)

Let's start with caffeine. Caffeine is in a class of drugs that we call the psychoactive stimulants. And everyone knows that caffeine can make them more alert. It can wake them up. But there are at least two additional, hidden features of caffeine that some people may not be aware of.

The first is the duration of action of caffeine. Caffeine, for the average adult, will have what we call a half-life of about five to six hours. What that means is that after about five to six hours 50 percent of that caffeine that you had is still circulating in your system. What that also means is that caffeine has a quarter-life of about 10 to 12 hours. In other words, let's say that you have a cup of coffee at 2pm in the evening. It could be that almost a quarter of that caffeine is still swilling around in your brain at midnight. And as a result, it can make it harder for an individual to fall asleep or even stay asleep soundly throughout the night. So that's the first feature of caffeine.

Frequently Occurring Word Combinations


ngrams of length 2

collocation frequency
eye movement 4
fall asleep 2
stay asleep 2
deep sleep 2
rapid eye 2

ngrams of length 3

collocation frequency
rapid eye movement 2

Important Words


  1. action
  2. additional
  3. adult
  4. alcohol
  5. alcoholic
  6. alert
  7. asleep
  8. average
  9. aware
  10. brain
  11. caffeine
  12. call
  13. circulating
  14. class
  15. coffee
  16. cup
  17. day
  18. drink
  19. drugs
  20. duration
  21. evening
  22. fall
  23. feature
  24. features
  25. glass
  26. harder
  27. hidden
  28. hours
  29. impacts
  30. individual
  31. kind
  32. means
  33. midnight
  34. music
  35. night
  36. people
  37. percent
  38. psychoactive
  39. quarter
  40. result
  41. science
  42. sleep
  43. sleeping
  44. soundly
  45. start
  46. stay
  47. stimulants
  48. substances
  49. surprising
  50. swilling
  51. system
  52. turns
  53. wake
  54. wine
  55. words