Not spending enough time in the two deep stages of sleep — slow-wave and rapid eye movement, or REM, sleep — may hasten the ...

As more patients report using cannabis in a state where medical marijuana is legal, researchers across several disciplines at ...

REM stages and one REM stage. Ideally, you repeatedly cycle through each stage. Learn how long each stage lasts.

Oxygen re-saturation during sleep is significantly affected by sleep stage and by cardiovascular and pulmonary comorbidities.

If you're experiencing symptoms of a potentially serious sleep disorder, a comprehensive sleep study serves as a crucial ...

Medications that help patients sleep linked to more falls, fractures, and other problems after joint procedures, a study ...