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 processing and storing memories. As we sleep, our brain ...

In my last post, I asked, "Are you getting enough sleep?" Today, in an effort to better understand the role of sleep in our lives, I ask a very basic question: What happens when our heads hit the ...

Sleeping for 7 to 9 hours at night isn't the only way to catch some z's. Here are four alternative sleep cycles -- and they're pretty obscure. Annie Miller Medical Reviewer Annie Miller is a licensed ...

Ever wonder why some mornings you wake up ready to go, and others you feel like a zombie? The difference often comes down to when you wake up during your sleep cycle, and that’s exactly what a sleep ...