People can learn while sleeping

  Only after falling asleep can the body function be restored, which is why people need to sleep. A person should spend at least 1/3 of his life sleeping, otherwise he will not live his life expectancy. The importance of sleep need not be said more. But for the “learning madman”, it seems “too uneconomical”, and they would rather spend their dream time on study. If we can really use this time to study, it would be perfect, even for those who don’t like to study, wouldn’t it be beautiful to play during the day and study after falling asleep? So is this even possible?
  The current answer is: probably. But the current technology is not yet mature!
  First, let’s take a look at what the brain does when we fall asleep.
  In the sleep state, although the body is lying still and has no response to the outside world, the brain is still active. This activity can be reflected by an imaging technique called an electroencephalogram, which observes brain activity in real time. During sleep, the brain sequentially enters different stages. During each sleep stage, the brain produces a different rhythm of brain waves, which continue to cycle.
  There are two main stages of sleep, one is called slow wave sleep, in which the brain waves of the brain present at 1 Hz to 4 Hz (that is, 1 to 4 cycles per second). Slow-wave sleep is also often referred to as deep sleep. If you are forced to wake up at this stage, you will feel drowsy, and your spirit may be more sluggish than not sleeping.
  The other stage is called REM sleep. This stage is particularly interesting, the brain waves look the same as when you are awake, very active and irregular, and the eyeballs move quickly, of course we don’t know it ourselves, and outsiders can’t detect it because the eyelids are closed. . At this stage, your body is almost completely inactive, but the muscles of your eyeballs and respiratory system move, and your brain is still dreaming. Most dreams occur during this time period.
  Every night, your brain keeps going from slow-wave sleep to REM sleep, back to slow-wave sleep, back to REM sleep…and the cycle goes on and on. A slow wave sleep plus a rapid eye movement sleep is a sleep cycle, which takes about an hour and a half.
  In addition, the brain consolidates new memories during sleep. This has been verified many times in various animals, including humans. Therefore, those who want to improve the review efficiency must not stay up late, but must ensure sleep. If you have an exam the next day, don’t “cramp on” on the day of the exam, you must complete it before going to bed the night before, and the memory effect will be much better.
  So, what is the principle of “learning while sleeping”?
  In fact, as early as more than 100 years ago, many people thought that sleep and hypnosis were the same thing. They believed that if someone kept chanting hints in your ear during sleep, you would absorb the hints better. This logic certainly seems untenable now. But in the early 20th century, some American businessmen took advantage of this knowledge loophole and invented a machine called “Telephone”, which claims to be able to change the user’s mind, make people more confident, and learn new languages. In fact, the essence of this product is a repeater.
  A 2014 study showed that listening to new words that people have learned in their sleep can indeed help memory. In the study, scientists recruited nearly 70 Germans who had never learned Dutch, asked them to memorize 120 Dutch words in one sitting, went to sleep immediately after learning, and played the previously learned words while they slept. recording. It was found that even though these learners were unaware that they had heard the words during sleep, and had no idea which words they had heard, in the post-wake test, they mastered significantly more words that they had heard in sleep than none of them. Heard more words. This provides some evidence for sleep learning that consolidates pre-existing memories during sleep.
  However, this result was obtained in a laboratory, where the sleep environment, the volume of the sound, and the sleep of each individual are carefully monitored by professionals to minimize the negative impact of sound on sleep quality. . But if you try to copy it at home, you are likely to be disturbed by the noise and sleep, which will lead to a lack of energy during the exam the next day.
  Experimental studies have also shown that what can be accomplished in sleep is limited to learning tasks that are highly repetitive, have general conditioned responses, and tend to be completed by pure memory. Once it involves more complex and needs a more complete logical thinking system to understand, such as knowledge related to mathematics, physics and chemistry, etc., there is no way to simply listen to the recording in sleep. Therefore, students who study liberal arts, or friends who want to learn foreign languages, may wish to look forward to the improvement of this technology in the future!

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