'Memory Pinball' And Other Reasons You Need A Nap | WAMU 88.5 - American University Radio
Filed Under:

'Memory Pinball' And Other Reasons You Need A Nap

Play associated audio

We spend about one-third of our lives sleeping, but much of that function remains a mystery. Weekend Edition Sunday is asking some pretty fundamental, yet complicated, questions about why we do it and why we can't seem to get more of it.

Dr. Matthew Walker says the question of why we sleep remains "that archetypal mystery."

Walker, the principal investigator at the sleep lab the University of California, Berkeley, works with patients who suffer from sleep abnormalities. He says the complexity of sleep makes the research that much more fascinating.

"There have been so many great discoveries within science based on the revolution of sort of genetics and molecular biology, and sleep remains resistant to all of that in terms of an answer," he tells Weekend Edition host Rachel Martin.

Walker says there have been several critical discoveries, however, illuminating how sleep helps us learn and retain information. Researchers are also taking note of the negative side effects of not getting enough sleep.

Research on learning suggests "sleep is critical at almost all stages of memory formation, memory processing and long-term memory retention," he says.

Science also backs up historical anecdotes about how sleep fosters creativity.

"There seems to be some type of memory processing that's creative that starts to take pieces of information that we've learned recently and starts trying to test the connections between that recent information and all of the information you've got stored in your brain," he says. "So it's almost like memory pinball — you're bouncing that information around, you're testing which connections to build."

So what happens if you don't sleep? "A whole constellation of different brain and body functions start to deteriorate," he says. Our brains are less effective at absorbing new information without sleep. Plus, our ability to retain recently learned information is impaired, and "you lose the chance to essentially hit the save button on that information."

Aside from memorization, sleep deprivation makes it harder for the brain to regulate emotions.

From an evolutionary perspective, sleep doesn't seem like a good idea: survival instincts are on hold. But Walker says the fact that sleep has stuck around so long shows its biological importance.

"Sleep serves so many wonderful, beneficial functions that far outweigh those potential downsides to it," he says.

Copyright 2013 NPR. To see more, visit http://www.npr.org/.

NPR

In An Earthquake, History Fuels One Writer's Anxiety

An earthquake in Napa Valley this week brought back old fears for author Gustavo Arellano. In his anxiety he's revisiting the book, A Crack in the Edge of the World.
NPR

Real Vanilla Isn't Plain. It Depends On (Dare We Say It) Terroir

There's no such thing as plain vanilla — at least if you're talking about beans from the vanilla orchid. Whether it's from Tahiti or Madagascar, vanilla can be creamy, spicy or even floral.
NPR

Climate Policy Takes The Stage In Fla. Governor's Race

Rick Scott, Florida's GOP governor, has come under criticism for his record on the environment. Now, he's rolling out his own proposals for safeguarding the state's water and wildlife preserves.
NPR

An App Can Reveal When Withdrawal Tremors Are Real

You probably haven't thought about whether your phone could help diagnose alcohol withdrawal. Well, it can. An app for doctors measures tremors and may help tell if someone's faking it to get drugs.

Leave a Comment

Help keep the conversation civil. Please refer to our Terms of Use and Code of Conduct before posting your comments.