SLEEP (pt 1:stages)

Today is all about sleep on this article (sleep pt1) We're going to be
looking at the stages and types of sleep courtesy of helpguide.org



There are two main types of sleep



1.) Non-REM (NREM) sleep consists of
three stages of sleep, each deeper
than the last.


2.) REM (Rapid Eye Movement) sleep is
when you do most active dreaming.
Your eyes actually move back and
forth during this stage, which is why
it is called Rapid Eye Movement
sleep.



The Stages of Sleep

Non-REM sleep


Stage N1 (Transition to sleep) – This
stage lasts about five minutes. Your
eyes move slowly under the eyelids,
muscle activity slows down, and you
are easily awakened.


Stage N2 (Light sleep) – This is the
first stage of true sleep, lasting from
10 to 25 minutes. Your eye movement
stops, heart rate slows, and body
temperature decreases.



Stage N3 (Deep sleep) – You're
difficult to awaken, and if you are
awakened, you do not adjust
immediately and often feel groggy and
disoriented for several minutes. In this
deepest stage of sleep, your brain
waves are extremely slow. Blood flow
is directed away from your brain and
towards your muscles, restoring
physical energy.


REM SLEEP


REM sleep (Dream sleep) – About 70
to 90 minutes after falling asleep, you
enter REM sleep, where dreaming
occurs. Your eyes move rapidly, your
breathing shallows, and your heart
rate and blood pressure increase. Also
during this stage, your arm and leg
muscles are paralyzed.


The next article(sleep pt2) would dwell on the effects of not sleeping