Too much REM sleep: why do depressed people wake up exhausted? | Human Givens
REM Sleep - How Much Sleep Do You Need
The brain benefits of deep sleep -- and how to get more of it | Dan Gartenberg
Is Too Much REM Sleep An Issue? | Cabral Concept 2336
REM Sleep Disorder
How to Get More REM Sleep
What's REM Sleep - How Much Do You Need?
How much sleep do you really need? | Sleeping with Science, a TED series
The surprising health benefits of dreaming | Sleeping with Science
The Danger of Sleeping Too Much
Sleep: What's REM Got to do With It
Mayo Clinic Minute: What are the stages of sleep?
REM Sleep behavior disorder
Why you're still tired after getting 8 hours of sleep
A walk through the stages of sleep | Sleeping with Science, a TED series
What happens when we sleep?
Insomnia: why can't I sleep?
2-Minute Neuroscience: Sleep Paralysis
How Some People Can Sleep Through Anything
What causes insomnia? - Dan Kwartler