Brenda Hall

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'Memory Pinball' And Other Reasons You Need A Nap

We spend about one-third of our lives sleeping, but much of that function remains a mystery. <i>Weekend Edition Sunday</i> is asking some pretty fundamental, yet complicated, questions about why we do it and why we can't seem to get more of it.<p>Dr. Matthew Walker says the question of why we sleep remains …

Brains Sweep Themselves Clean Of Toxins During Sleep

While the brain sleeps, it clears out harmful toxins, a process that may reduce the risk of Alzheimer's, researchers say.<p>During sleep, the flow of cerebrospinal fluid in the brain increases dramatically, washing away harmful waste proteins that build up between brain cells during waking hours, a …

Why do we sleep? To clean our brains, say US scientists

Scientists in the US claim to have a new explanation for why we sleep: in the hours spent slumbering, a rubbish disposal service swings into action that cleans up waste in the brain.<p>Through a series of experiments on mice, the researchers showed that during sleep, cerebral spinal fluid is pumped …

The Real-Life Walking Dead

Cotard's syndrome, also known as Walking Corpse Syndrome, is a rare disorder that causes sufferers to believe they are dead. The exact cause is unknown. Doctors Thomas Linden and Andres Hellden describe effects of the syndrome that they observed in patients who took a common antiviral …

How Playing Fruit Ninja Can Help Stroke Victims

Researchers discover that using a video game motion sensor such as Xbox Kinect has the potential to spur the brains of stroke victims to reorganize and restore some motion in limbs.<p><b>Video games that employ virtual reality and</b> motion sensors have been shown to help stroke victims recover function in …

Near-death experiences are overwhelmingly peaceful

Near-death experiences are rare, but if you have one, it is likely to be overwhelmingly peaceful, however painful it might have been to get to that …