Knowledge Center

Study also found sinuses act like a bellows, help keep brain the right temperature.

Yawning helps keep the brain cool, and the sinuses play a role in that process by acting as bellows, a new report suggests.

Yawning isn’t triggered because you’re bored, tired or need oxygen. Rather, yawning helps regulate the brain’s temperature, according to Gary Hack, of the University of Maryland School of Dentistry, and Andrew Gallup, of Princeton University.

“The brain is exquisitely sensitive to temperature changes and therefore must ...

More than one-third of Americans sleep less than seven hours a night, and many pay for it the next day. Are you among the walking bleary? Try one of these tricks to get the rest your body craves.

Too many Americans aren’t getting enough sleep — and their minds and bodies are paying the price, according to two new surveys released by the U.S. Centers for Disease Control (CDC). More than one-third of American adults clocked in seven or fewer ...

Sleep plays a critical role in how we learn and how we remember. Learn about the latest studies involving the brain, memory, and how much sleep you need.

It is well-known that a good night’s sleep is critical for a healthy body. Now recent research has shown that sleep is even more important when it comes to learning and memory than previously thought.

“If you shorten sleep both short-term (one night) or long-term (more than two weeks), the ability to ...

Sure, cozying up for a midday siesta sounds relaxing. But it may be even healthier for you than you think.

Want to ace that next test? Try taking a mid-afternoon siesta.

While the findings are preliminary, new research raises the prospect that sleep, specifically a lengthy afternoon nap, prepares the brain to remember things. Think of it as similar to rebooting a computer to get it to work more smoothly.

“Sleep is not just for the body. It’s very much for ...

Circadian rhythm isn’t a new type of dance step; it has to do with our internal sleep clock. Learn about how your sleep clock works.

Your pattern of sleep and waking is run by the body’s internal sleep clock. Governed by light, your internal sleep clock tells you when it’s time to fall asleep and wake up. Your internal sleep clock, otherwise known as the circadian rhythm, runs on a 24-hour cycle. Disruptions to the circadian rhythm and your internal sleep ...

The number of hours of sleep you need to stay healthy and alert differs according to your gender and age.

Sleep is key to your physical health and emotional vitality, but just how many hours of sleep you need depends on your age, your stage of development, and your gender.

“Sleep is important for mental function: alertness, memory consolidation, mood regulation, and physical health,” says Phyllis C. Zee, MD, PhD, professor of neurology and director of the Sleep Disorders Center at ...

Learn about the different stages of sleep, from light to deep sleep, after your head hits the pillow.

When you sleep, your body goes through several sleep cycles, each involving different sleep stages.

Most adults need seven to eight hours of sleep every night, and during this time, your body goes through different phases. The four sleep stages of sleep include:

REM Sleep Confusion

While rapid eye movement (REM) sleep gets a lot of attention, researchers are still trying to decipher ...

Daylight-saving time doesn’t have to disrupt your sleep schedule. A few simple tips help ensure sound sleep during daylight-saving time and beyond.

For most of us, the springtime switch from standard to daylight-saving time is merely an inconvenience. It might be the cause of skipped appointments if we manage to miss all those reminders telling us to move our clocks forward one hour on the second Sunday in March.

But for others, the first few days of daylight saving time ...

Don’t take sleep woes lying down! Here are 10 ways to overcome age-related sleep problems.

If sleep is becoming more difficult for you as you get older, try these steps:

1. Talk to your doctor. If you have a health condition that is making it difficult for you to sleep, such as severe arthritis, chronic pain, or obstructive sleep apnea, getting it treated may help you sleep better.

2. Limit caffeine and alcohol. Gehrman recommends avoiding excess caffeine and alcohol, since these ...