I don't really think anything causes REM sleep. REM stands for rapid eye movement, and it's one of the stages of sleep. I'm not certain, but I think it's the stage of sleep where your dreams are most vivid, meaning the deepest form of sleep.
In sleep apnea people enter REM sleep just fine. The problem is that when the muscles relax in the first part of REM sleep the airway collapses and they stop breathing. This interrupts the sleep cycle and they get poor sleep amongst other problems. Not entering REM sleep causes what is known as "REM sleep behavior disorder". They do not have the normal paralysis that accompanies the dream stages of REM sleep so they may act out dreams. Sleepwalking is one example. For more information see the link below.
Narcolepsy
REM sleep is amazing sleep!
REM rebound involves the tendency for REM sleep to increase following REM sleep deprivation.
REM (Rapid Eye Movement) sleep is active sleep.
3/13/2012 jhh: REM sleep is NOT deep sleep. In fact, it is the lightest stage of sleep. In order from awake to deep sleep: AWAKE, REM, LIGHT, DEEP. Deep sleep and REM sleep are the most important stages though. Light sleep doesn't do much for you. Deep replenishes your body, while REM replenishes your mind. Older answer (not accurate): Yes. It is the deeper form of sleep that we experience during our sleep cycle, rem sleep is where dreaming occurs But not the deepest sleep, which would be delta. That's where, unless your a mother and hear your baby cry, you are oblivious to your environment.
Yes blind peole have REM sleep!!
There are 4 non-REM stages and REM sleep.
You will know when someone is in REM sleep when there eyes-lids are moving really fast back and forward. REM sleep is a sleep that is after your first 4 stages of sleep and is the stage of sleep that you dream.
rem hypnosis
Is REM sleep deprivation associated with SIDS?
During REM sleep, people seldom dream.