Doctors Orders

Is waste-removal system at work during slumber?

Why do humans need sleep? That age-old question may have an answer, with scientists finding that slumber seems to help the brain clear away potentially harmful waste that builds up during the day.

The new study of mice found that by “taking out the trash” during sleep, the brain clears away toxins thought to be responsible for brain disorders such as Alzheimer’s disease.

“This study shows that the brain has different functional states when asleep and ...

Meanwhile, sleep deprivation appeared to harm brain cells

The reproduction of cells involved in brain repair is boosted during sleep, according to a new study of mice.

Researchers from the University of Wisconsin, Madison, found that sleep increases the process by which certain cells, known as oligodendrocytes, form myelin. Myelin is the insulation on nerve cells in the brain and spinal cord that allows electrical impulses to move rapidly from one cell to another.

In conducting the study, published in the Sept. 4 ...

Athletes with the least shuteye had lower baseline scores.

Getting too little sleep the night before undergoing baseline concussion testing can skew results, a new study finds.

Baseline concussion testing depicts an athlete’s basic mental abilities, such as reaction time, working memory and attention span. Athletes who suffer a concussion retake the test, and if there is a large decrease in the score, they are typically banned from play until their score improves.

The study included more than 3,600 high school- and college-aged ...

People with most varied diets are also best-rested, study finds.

What you eat can affect how well you sleep, according to a new study.

Researchers found that certain nutrients may play a role in sleep duration. And they also concluded that people who eat a wide variety of foods (an indicator of an overall healthy diet) had the healthiest sleep patterns.

“Although many of us inherently recognize that there is a relationship between what we eat and how we sleep, there have been ...

Others may misjudge you because of your droopy eyelids, hangdog expression

Every face tells a story, and when you’ve had too little sleep the world sees it in technicolor, a new study suggests. What’s more, those red, puffy eyes and sagging eyelids likely influence what people think of you, the researchers say.

So, the next time you’re tempted to pull an all-nighter, consider that “other people might treat you differently because of the way you look when you haven’t slept,” said lead ...

In our culture, we tend to value the ability to function on few hours of sleep. But not getting enough sleep can lead to health problems and even shorten your life.

There are an endless number of pursuits that make us want to push our bedtime later and later, from work to Facebook to our favorite TV shows. Making a habit of skimping on sleep can have a huge impact on health and even lead to a shorter life.

Studies have consistently ...

What makes someone a light sleeper, and how you can enjoy a deeper, heavier sleep? You’ll rest easy after learning these simple tips.

For some people, the slightest noise awakens them at night. For others, the wailing siren of a passing fire truck doesn’t disturb their slumber. Just why, though, remains a bit of a mystery.

Although many people are self-proclaimed light sleepers or heavy sleepers, researchers have found that little is actually known about why people react differently to noises and ...

Blood levels from nighttime dose remain too high the next morning, agency says.

The U.S. Food and Drug Administration announced Thursday that it is asking manufacturers of sleep medications containing zolpidem — including Ambien — to lower the recommended doses and to provide more safety information to patients.

These sleep medications include Ambien, Ambien CR, Edluar and Zolpimist, as well as generic versions of Ambien and Ambien CR.

Officials are concerned that blood levels of zolpidem are high enough the morning after taking ...

Some American workplaces are embracing the concept of an afternoon siesta, but plan carefully to wake well rested and feel more productive.

Ready for a midday snooze? Don’t feel guilty about it. Napping may just be the answer to a more productive workday.

More companies in the United States are starting to offer on-the-job sleep options for employees, ranging from special napping rooms to expensive sleep pods. Progressive, well-known companies like Google, Zappos, and Ben & Jerry’s are “nap friendly.” Yet can ...

Primary hypersomnia is defined by excessive daytime sleepiness in the absence of known causes of sleepiness.

An abnormal protein in cerebrospinal fluid appears to cause hypersomnia, a form of excessive daytime sleepiness, and an off-the-shelf drug effectively treated it, researchers said.

Extracted from patients with primary hypersomnia, the elusive substance, which was not fully isolated in the study, enhanced the sensitivity of subtype A gamma-aminobutyric acid (GABA) receptors, reported David Rye, MD, PhD, of Emory University in Atlanta, and colleagues.

Moreover, seven patients ...