Light sleep is the beginning of your sleep cycle and your body's way of winding down. Breathing, heart rate and muscle changes prepare your body for the deeper sleep to come. Light sleep is broken ...

Rapid Eye Movement (REM) sleep, the period in which we experience vivid dreams, was discovered by scientists in the 1950s. Because REM sleep is associated with dreaming, on the one hand, and eye ...

REM stands for rapid eye movement — a stage in the sleep cycle when your brain is almost as active as when you’re awake. Getting enough REM sleep is crucial, as it helps you store information and ...

There are tell-tale signs when you don’t get enough REM sleep. It’s the fourth stage of sleep and it’s crucial for processing ...

Dreaming, memory-making, problem-solving: A lot happens during the most active sleep phase By Carolyn Todd Any sleep tracker will show you that slumber is far from a passive affair. And no stage of ...

Smartwatch makers promise to turn your wrist into a sleep lab, translating tiny movements and heart rate blips into colorful ...

Valerie Cacho, MD, is a board-certified sleep medicine specialist and the founder of the online educational company Sleephoria. Make sure you follow a consistent sleep schedule to help regulate your ...

Researchers trace how different sleep stages may fine-tune what we remember, trading specifics for more general knowledge. When you purchase through links on our site, we may earn an affiliate ...

Eugene Aserinsky never wanted to study sleep. He tried being a social worker, a dental student, and even did a stint in the army as an explosives handler. He enrolled at the University of Chicago to ...

RBD is marked by loss of REM sleep atonia, leading to physical dream enactment. Polysomnography is essential to confirm RBD and rule out other disorders. Idiopathic RBD is a strong predictor of ...