Past age 50, men are much more likely to have REM sleep behavior disorder than women. Jose Luis Pelaez/Stone via Getty Images Every night, you go through four to five sleep cycles. Each cycle, lasting ...

Non-24-hour sleep-wake disorder (N24SWD) occurs when your sleep-wake cycle gradually shifts out of sync with the 24-hour day. It affects about half of blind people, but it can also affect those with ...

A little-known and poorly understood sleep disorder that occurs during the rapid eye movement, or REM, stage of sleep has been garnering attention for its role in foreshadowing neurodegenerative brain ...

Complications of sleep apnea can range from high blood pressure to heart problems and diabetes. But emerging research suggests that sleep apnea can sometimes trigger migraine episodes. Sleep apnea is ...

More than 50 million Americans have a sleep disorder. Insomnia is the most common sleep disorder. Sleep apnea can cause breathing to stop 30 or more times in one hour. More than 50 million Americans ...

Jill was in middle school when she began eating in her sleep. Despite carrying the food back to her bed to devour night after night, she didn’t have a clue about what she had done until the next ...