4 years ago
The fascinating science of sleep and its role in human evolution
Live MintIt was the Upanishads that introduced me to the kinds of sleep. Vladimir Nabokov called sleep the “nightly betrayal of reason, humanity, genius”, Arnold Schwarzenegger advised those who want eight hours of it to “sleep faster”, and Margaret Thatcher prided herself in getting by with four hours. Human beings sleep in 90-minute cycles—each comprising light sleep REM, or Rapid Eye Movement, and non-REM or deep sleep. “During deep sleep, your brain goes into this incredible synchronised pattern of rhythmic chanting,” says Walker. “There’s a remarkable unity across the surface of the brain, like a deep, slow mantra, almost like a coma.” However amazing non-REM sleep is, it is REM sleep that made us human.
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1 year, 10 months ago
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1 year, 10 months ago
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