paradoxical sleep
rapid eye movement sleep
REM sleep
rapid eye movement
REM

REM sleep is also considered a poikilothermic state in humans.

To anyone observing them, it would have looked as if they were in a deep REM sleep.

REM sleep began within two or three minutes after injection, instead of the half hour it would take naturally.

I was deep in REM sleep and it took me a moment to surface.

REM sleep appears to be important for development of the brain.

However, this does not explain why older adults still need REM sleep.

While in the water, these seals have almost no REM sleep and may go a week or two without it.

It has been found to have effects on the regulation of REM sleep.

REM sleep has been ruled out, because of patient's current condition.

One key use of REM sleep is for the brain to process and store information from the previous day.