Your brain can slip into dream-filled rapid eye movement, or REM sleep, in a matter of minutes, but for some people that journey takes much longer. And new research suggests this delay might be more ...

REM is the sleep cycle stage when dreaming occurs. Rapid eye movement "dream sleep" occurs cyclically about every 90 minutes in between the other "dreamless" stages of non-REM (NREM) sleep. Source: ...

Medically reviewed by Sanja Jelic, MD Key Takeaways The sleep cycle has three NREM stages and one REM stage.Deep sleep occurs in stage 3 and is crucial for feeling refreshed.REM sleep helps in ...

Obstructive sleep apnea, a condition that causes lower oxygen levels during sleep, is linked to degeneration of brain regions associated with memory through damage to the brain's small blood vessels, ...

Findings from Mass General Brigham investigators highlight the intricate interplay of diverse physiological processes as the brain shifts from wakefulness to sleep. A new study by investigators from ...

Non-rapid eye movement (NREM) sleep arousal disorders involve repeated episodes of incomplete awakening from sleep, most commonly sleepwalking or night terrors (also known as sleep terrors), but ...

Experiment conducted by researchers at the University of California, Berkeley Feb. 1, 2013 — -- An experiment at the University of California, Berkeley, found that seniors enjoy less quality ...

Although cannabis is believed to have an interconnected role with both pain and sleep, its effects on chronic pain and sleep ...

A University of Michigan study shows dopamine neurons fire during NREM sleep after motor learning, strengthening skills ...