1.Conciousness: our awareness of ourselves and environment
2.Circadian Rythm: our biological clock that synchronizes our bodies (for
ex: body temperature and wakefulness) with the 24 hour cycle of day
and night-regulates our daily schedule of sleeping and walking
3.The Pineal Gland's role in sleep: ...
4.Alpha Waves: the relatively slow brain waves of a relaxed, awake stage
5.Delta Waves: the large, slow brain waves associated with deep sleep
6.Sleep Stage 1: about 10 minutes-our dive into sleep, marked by the
slow breath- ing and irregular brain waves/During this brief stage of
sleep (about 5-10 minutes) you may experience images resembling
hallucinations (sensory experiences that occur with all sensory stimuli)
and you may have a sensation of falling (at which moment your body
will suddenly jerk or floating weightlessly
7.Sleep Stage 2: About 20 minutes-you relax more deeply-it is
characterized by the periodic appearance of SLEEP SPINDLES (bursts of
rapid, rhythmic brain activity)-you can still be awakened easily, you are
now clearly asleep-sleep talking (usually garbled or nonsensical) can
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, occur during this stage or any other sleep stage
8.Sleep Stage 3: Transitional stage from 2 to 4 when your brain first
starts to emit large slow DELTA WAVES which are associated with deep
sleep
9.Sleep Stage 4: Deepest stage of sleep in which your brain emits an
increasing amount of delta waves (Brain waves at their slowest). at the
end of stage 4 children may wet the best or sleepwalk. Stage 3 and 4
together last about 30 minutes during which you are hard to awaken
10.What happens between stage 4 and rem as night goes on: stage 4
short- er-rem longer
11.After Stage 4: Goes to 3 to 2 to rem
12.Paradoxical Sleep: the body is internally aroused and externally
calm-another name for REM (rapid eye movement)
13.The Sleep Cycles: Repeats itself about every 90 minutes and as night
goes, deep stage 4 gets shorter and then disappears and REM sleep
gets longer (you last dream could be as long as 60 minutes. whereas
your first dream is 10). 20-25% of our average night's sleep is about
100 minutes, has been REM sleep (we dream about 4-5 times a night)-
600 hours a year dreaming and have more than 100,000 dreams in a
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