Stage 1 is the
initial stage of sleep. The muscles are relaxed and you find yourself in
a peaceful, pleasure and relaxing state. You are less aware of the
external environment and you feel like floating or falling. In this
stage, the eyes movement, heart rate and brain waves slow down and you
can easily be woken up.
Stage 2 is
similar to stage1 except that the eyes movement stop, the brain waves
are slower with occasional burst of rapid brain waves. You require a
heavier touch, louder noise to awake you. Stage1 and stage 2 last about
thirty minutes.
This is
the begining of deep sleep. In stage3, the brain waves slow down more
but there is still occasional rapid waves. You are deeper into your
sleep and have no awareness of the external environment. Hence it is
more difficult to awake you as compare to stage1 and stage2.
In stage 4, you are in
deep sleep. The brain wave is even more slower. This is truly a restful
experience because the body muscles are now even more relaxed than when
are awake. Your body has very little movement as your brain is not
sending messages to the body muscles. However you still can be awakened
but only with a much stronger stimulus.
This is the stage when
your brain wave becomes very similar to that produced when your brain is
in awake state. At this time, your eyes dart about in rapid movement and
you start to dream. Your heart rate and blood pressure rise and fall
along with what you experienced in your dream. However, your brain
signal is blocked from reaching your body muscle. Thus you are not able
to act out the dream that your brain is experiencing.
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