What Happens To Your Body & Brain If You Don’t Get Sleep? Neuroscientist Matthew Walker Explains

As an insomniac in a morning person’s world, I wince at sleep news, especially from Matthew Walker, neuroscientist, Berkeley professor, and author of Why We Sleep. Something of a “sleep evangelist,” as Berkeley News calls him (he prefers "sleep diplomat"), Walker has taken his message on the road—or the 21st century equivalent: the TED Talk stages and animated explainer videos.

One such video has Walker saying that “sleep when you’re dead” is “mortally unwise advice… short sleep predicts a shorter life.” Or as he elaborates in an interview with Fresh Air’s Terry Gross, “every disease that is killing us in developed nations has causal and significant links to a lack of sleep.”




Yeesh. Does he lay it on thick? Nope, he's got the evidence and wants to scare us straight. It's a psychological tactic that hasn’t always worked so well, although next to “sleep or die” sermons, there’s good news: sleep, when harnessed properly (yes, somewhere in the area of 8 hours a night) can also be a “superpower." Sleep does “wonderfully good things… for your brain and for your body,” boosting memory, concentration, and immunity, just for starters.

But back to the bad....

In the Tech Insider video above, Walker delivers the grim facts. As he frequently points out, most of us need to hear it. Sleep deprivation is a serious epidemic—brought on by a complex of socio-economic-politico-technological factors you can probably imagine. See Walker’s comparisons (to the brain as an email inbox and a sewage system) animated, and learn about how lack of sleep contributes to a 24% increase in heart attacks and numerous forms of cancer. (The World Health Organization has recently “classified nighttime shift work as a probable carcinogen.”)

On the upside, rarely is health science so unambiguous. If nutritionists could only give us such clear-cut advice. Whether we'd take it is another question. Learn more about the multiple, and sometimes fatal, consequences of sleep deprivation in the animated TED-Ed video above.

Related Content:

Sleep or Die: Neuroscientist Matthew Walker Explains How Sleep Can Restore or Imperil Our Health

How Sleep Can Become Your “Superpower:” Scientist Matt Walker Explains Why Sleep Helps You Learn More and Live Longer

10 Hours of Ambient Arctic Sounds Will Help You Relax, Meditate, Study & Sleep

Josh Jones is a writer and musician based in Durham, NC. Follow him at @jdmagness.


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