Press-Republican

FYI...

October 21, 2013

Sleep: The ultimate brainwasher?

Every night since humans first evolved, we have made what might be considered a baffling, dangerous mistake. Despite the once-prevalent threat of being eaten by predators, and the loss of valuable time for gathering food, accumulating wealth, or having sex, we go to sleep. Scientists have long speculated and argued about why we devote roughly a third of our lives to sleep, but with little concrete data to support any particular theory. Now, new evidence has refreshed a long-held hypothesis: During sleep, the brain cleans itself.

Most physiologists agree that sleep has come to serve many different purposes, ranging from memory consolidation to the regulation of metabolism and the immune system. While the "core" purposes of biological functions such as breathing and eating are easy to understand, however, scientists have never agreed on any such original purpose for sleeping. The new study, by Maiken Nedergaard and colleagues at the University of Rochester in New York, provides what Charles Czeisler, a sleep researcher at Harvard Medical School in Boston, calls the "first direct experimental evidence at the molecular level" for what could be sleep's basic purpose: It clears the brain of toxic metabolic byproducts.

The new work, published online Thursday in Science, "fits with a long-standing view that sleep is for recovery — that something is paid back or cleaned out," says David Dinges, a sleep researcher at the University of Pennsylvania. It builds on Nedergaard's recent discovery, described last summer in Science Translational Medicine, of a network of microscopic, fluid-filled channels that clears toxins from the brain, much as the lymphatic system clears out metabolic waste products from the rest of the body. Instead of carrying lymph, this system transports waste-laden cerebrospinal fluid (CSF). Before the discovery of this "glymphatic system," as Nedergaard has dubbed it, the brain's only known method for disposing of cellular trash was to break down and recycle it within individual cells, she says.

Text Only | Photo Reprints
FYI...
  • Stepping forward: The real Colbert

    Letterman changed the late-night TV game between his run on NBC's "Late Night" and starting the "Late Show" franchise in 1993. And while it's tough to replace a pop-culture icon, Colbert, in terms of pedigree and sense of humor, makes the most sense.

    April 16, 2014

  • news_twitter.jpg Travelers fly on Air Twitter

    The enlightened age of social media has dawned over the airline industry, casting shadows over telephone call centers and on-site agents. Facebook and Twitter are racking up the friends and followers while the hold music plays on.

    April 15, 2014 1 Photo

  • 297px-Starbucks_Corporation_Logo_2011.svg.png Why Starbucks won't recycle your paper coffee cup

    When you drop that used white paper cup into the bin next to the door at a Starbucks, have you done your part to save the planet? Starbucks has long hoped that you would think so. After all, there's no better way to attract an affluent, eco-conscious clientele than to convince customers that your disposable product is "renewable."

    April 14, 2014 1 Photo

  • Screen Shot 2014-04-08 at 2.16.35 PM.png Are Americans smart to stop drinking diet sodas?

    Recent data from Beverage Digest suggest many are cutting back on diet sodas. Consumption of diet sodas fell more than that of sugary sodas in 2013. This raises two questions: Why is total consumption declining, and is drinking diet soda harmful to health?

    April 13, 2014 1 Photo

  • Fast, cheap test can help save lives of many babies

    As Easley did more research into her daughter's death, she learned that a pilot program had started just months earlier at Holy Cross Hospital in Silver Spring, Md. (Easley had delivered at a different hospital in the Washington area.) The program's goal was to screen every newborn with a simple pulse oximeter test that can help detect heart problems such as Veronica's, allowing doctors to respond.

    April 12, 2014

  • Starbucks retools pastry menu after customer complaints

    After the coffee chain bought gourmet-baking company La Boulange in 2012, it used the acquisition to add fancier pastries to U.S. locations. Now Starbucks is discovering that some customers liked the food better before, prompting another round of retooling.

    April 11, 2014

  • Lindley, Tom.jpg Taking someone out to the ballgame gets expensive

    Families in big-league cities like Boston and New York pay steep prices to catch a baseball game. It's not so expensive everywhere - especially if you're frugal.
     

    April 10, 2014 1 Photo

  • How improv comedy skills became a must-have for entrepreneurs

    A few years ago, for complex reasons, I attended the orientation week for Columbia Business School students. The week involved team-building exercises that forced us to solve problems together.

    April 9, 2014

  • news_amazonfiretv.jpg Amazon introduces Fire TV to challenge Apple in living rooms

    Amazon.com Chief Executive Officer Jeff Bezos is stepping up efforts to win over customers in their living rooms with a $99 TV box for watching digitally delivered shows and movies, challenging Apple's TV device.

    April 8, 2014 1 Photo

  • Hate With Friends, the fun new Facebook tool

    Hating movies, earworms, conventions of grammar, clothing brands, diet fads - you get the twinkle of pleasure without the glob of guilt, or the cold brush of fear. A Coldplay song doesn't know you hate it.

    April 7, 2014