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When the lights go out

Marion E Brooks-Bartlett21 June 2012

Sleep illustration

Sleep illustration by Matteo Farinella

Have you ever wondered what happens the moment you close your eyes and go to sleep? Did people give you this vague understanding of ‘it’s the time when your body gets to rest’?

Well, following Hans Berger’s invention of the Electroencephalogram (EEG) in 1924, we have been able to measures brain activity and we can now see that the brain is actually very active during sleep.

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