"Deep sleep builds your immune system, and REM sleep regulates and fine-tunes it," says Darwall-Smith agrees. During deep ...

However, some research shows that major stressors may increase REM sleep but reduce deep sleep. REM rebound, which is when we ...

“Stimulating brain waves with sound can increase their frequency and this can help to better understand how brain oscillations in REM sleep promote cognition and how REM sleep can be improved in ...

What if we could obtain the memory, learning and perception benefits of “power naps” without actually sleeping?

Research from Columbia University and NewYork-Presbyterian suggests that brain waves associated with sleep may help predict ... Sleep spindles are brief bursts of brain activity that occur during ...

More people are becoming obsessed with sleep trackers, causing insomnia and making sleep worse, experts say. Here’s how to tell if you have a problem.

Our brain uses light sleep to transition between slow-wave sleep, or deep sleep, and rapid eye movement, or REM, sleep, which is the stage in which we dream. Experts say about 50% of your night ...