In the stillness of the night, when the body should lie calm in sleep, something else may be happening beneath the surface.

When in doubt, ask an expert. Dr. Michael Breus, PhD, simplifies and differentiates REM sleep vs. deep sleep for us. So much impacts us emotionally in a single day, big and small. REM sleep allows you ...

Scientists think that deep sleep and rapid eye movement (or REM) sleep are particularly influential when it comes to brain health and dementia risk. A study published last month on people with ...

Polysomnography coupled with nocturnal penile tumescence recording confirmed this diagnosis, documenting recurrent awakenings, mostly after REM sleep, accompanied by painful erections. Painless ...

Many people think of Parkinson's disease (PD) as a movement condition that causes people to shake their hands, move slowly, ...

The cycle goes in the following order four to six times per night: Deep and REM sleep are critical stages, as your body and brain are actively working to restore function and keep you healthy.

11, 2025 — For people with a certain sleep disorder, a simple blood test could help predict the development of dementia years before symptoms appear, a new study indicates. Idiopathic REM sleep ...

in two cases the REM sleep phase itself was shortened. Polysomnography (Figure 2) was otherwise unremarkable as regards the presence of normal sleep architecture and the absence of sleep-related ...

This can happen either when you first fall asleep or when you're about to wake up. The cause of sleep paralysis is poorly understood but is thought to involve a disruption or fragmentation of rapid ...