When this is over, the cycle starts over; the original star dies and becomes a white dwarf. White Dwarf The core of a white dwarf star surrounds itself with layers of hydrogen, which still burn, continuing to fuse.
REM sleep is important because it is the restorative part of our sleep cycle. Typically, you begin the sleep cycle with a period of non-REM sleep followed by a very short period of REM sleep. The period of non-REM sleep is made up of stages 1 to 4. Each stage can last from 5 to 15 minutes.
- REM sleep is positively correlated with brain development. Therefore, function of REM may be to help with brain development which is why people fall back to REM sleep when their sleep is interrupted. - Organisms whose brains are developing spend more time in REM sleep (Babies tend to spend alot of time in REM).