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  • Dreams are an amazing phenomenon.


  • And considering you spend roughly 6 years of your life dreaming, it's quite curious that we often brush them aside to be quickly forgotten.


  • Night after night our brains go to work and bring us some of the most incredible, bizarre and often seemingly random imagery and storylines.


  • But what are dreams?


  • And like the many science fiction stories or movies, could we ever record and figure out what we're seeing while we're dreaming?


  • You may have heard of people referring to 'brain waves' before, but have you ever stopped to think: are these actual waves, and do they carry information?

    你以前可能聽過其他人談論「腦波 」,但你是否曾經想過它是真實的波嗎? 它可以攜帶資訊嗎?

  • Are brain waves similar to, say, radio waves?


  • The answer is, yes.


  • Both brain and radio waves are forms of electromagnetic radiation, waves that travel at the speed of light.


  • Every time you think, thousands of neurons fire at the same frequency and generate a wave.


  • These waves oscillate at around 10 to 100 cycles per second.


  • Radio waves, on the other hand oscillate at around 50 million to 1 billion times per second.


  • Scientists have long used this phenomenon to measure brain activity and interface the brain to electronic devices.


  • It allows us to see which parts of the brain are active for different activities, and similarly which parts of the brain are active during dreaming.


  • Strange as it may seem, we still barely understand why we sleep let alone why we dream.


  • Michael from Vsauce does a fantastic job explaining the main theories for why we dream.

    Vsauce 頻道的Michael 對於做夢最主要的理論做了一個很棒的解釋。

  • But there are so many theories because we can't really measure or know what people are dreaming about, without waking them up and asking them.


  • Of course, this is subject to forgetting or other errors.


  • Unfortunately, there is no device that exists to allow us to peer into the mind of a dreamer, or is there?


  • Crazy as it sounds, scientists have created a technique to do just that.


  • This mind-reading technology began with a functional MRI Scanner, inside which subjects were shown simple pictures made up of black and white pixels.


  • The software then finds patterns in the brain activity that corresponds to the specific images.


  • For example, if the letter "T" was shown, the software would record exactly how the brain reacted.

    舉例來說,如果看到了字母「T 」,儀器會紀錄頭腦產生的反應。

  • After sufficient data, the subjects were then shown completely different images, and the software would predict and recreate what it thought the subjects were seeing.


  • After being shown the word "Neuron" these were the images the software generated.

    它認為受試者看見的畫面。當受試者看見單字「neuron 」時,儀器會產生這樣的影像。

  • But it doesn't stop there.


  • Further studies began to use more complex visuals and started monitoring the subjects in their sleep.


  • In this case, they first had the subjects fall asleep while in an fMRI, and would wake them up in the middle of dreaming, quickly asking them what they were dreaming about.


  • They then used thousands of images from the internet to get a best approximation of what the subject was seeing based on brain scans.


  • After doing this nearly 200 times with each person, and plugging the information into a learning algorithm, software was used to predict and generate their future dreams.


  • Though by no means perfect, it was clear that the machines predictions were better than chance, matching up with the dreamers description.


  • Perhaps even more shocking is a study that used actual video footage.


  • After showing subjects two hours of movie footage and analyzing their brain activity, they then used a library of 18 million, 1 second YouTube clips to match the brain activity.


  • Here are the results: On the left are new, unrelated clips that the subjects were later shown, and on the right is what the software guessed they were seeing, using a mashed up combination of the YouTube clips as an approximation.

    結果是,畫面左邊是讓受試者觀看的全新影片,畫面右邊是儀器利用眾多YouTube 影片片段重組而成的影像,用來預測受試者看見的畫面。

  • All of this based on their brain waves.


  • As these software programs become more and more complex, we come that much closer to accurately visualizing and recording our thoughts and dreams.


  • At which point, perhaps, we'll have a few more clues into why we dream, in the first place.


  • And if you'd like to find out about other amazing and unanswered scientific phenomenon, head over to All Time 10's channel, where 10 fantastic science YouTubers have come together in an attempt to answer some burning questions.

    如果你想搜尋其他驚奇且未知的科學現象,過來 All Time 10's channel,有10位很棒的 YouTube 科學研究者聚在一起,試著解答正火熱的一些問題。

  • It's a super-collaboration of SCIENCE! And if you're new to AsapSCIENCE, be sure to subscribe for more weekly science videos! We've made a playlist of some of our favorite and most popular videos for your viewing pleasure. Enjoy!

    這是科學界的超級組合! 如果你是第一次來到AsapSCIENCE,記得要訂閱我們的每周科學影片。 我們已準備了許多最喜歡且最熱門的影片等你來觀賞。

Dreams are an amazing phenomenon.


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「夢」可以錄起來嗎? (Could We Record Our Dreams?)

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