1. Sleep

2. Interesting Statistics
77% adolescents go to bed after 10pm
84% get up before 7am
50% need an alarm to wake up
74% of Americans do not get enough sleep each night

3. Interesting statistics
Sleep Deprivation: Costs $150 billion each year in higher stress and reduced worker productivity.
Average American get 6 ¼ hours of sleep each night. About 2 hours less than a century ago.
Teens should get 65 hours of sleep during the week.

4. Interesting stats 2/3 teens do not get enough sleep
70 million Americans have sleep problems
35 million Americans suffer from a sleep disorder

5. Interesting stats
51% of Americans have admitted to driving while drowsy
100,000+ accidents/year
1550 deaths/year
24% of Americans have fallen asleep while driving
Peak drowsy times: 2am-4am; 2pm-4pm

6. Sleepiness and Reaction Time
After 18 hours awake, your reaction time begins to slow from ¼ second to ½ second…then longer.
Then you can begin experiencing microsleep – zoning out for 2-20 sec.
After 20 hours awake, your reaction time is the same as someone with blood-alcohol level of .08 (DUI level)

7. General Information About 1/3 of our life is spent sleeping
Averaging less than 5 hours of sleep will lead to sleep deprivation and problems
Less alert
Difficulty focusing and learning
Slower reaction time
Health Problems

8. General Info Sleep helps build resistance to infection
Sleep helps us recover from stress
Sleep aids in making learning easier and helps us retain information faster

9. Stages of Sleep
Sleep stages are defined in terms of brain-wave patterns
Awake and alert, the brain emits beta waves (short and quick)
Drowsy and relaxed, the brain emits alpha waves (slower)

10. Stage 1: Lightest stage of sleep.
Brain waves slow from alpha to theta
Transition may be accompanied by brief images that resemble photographs
If awakened during this stage, we will recall these images and feel as if we haven’t slept at all
Stage lasts minutes.

11. Stage 2:
Brain moves to the slowest pattern of brain waves – delta waves
Spindles may also occur – rapid bursts of activity

12. Stage 3: Delta waves continue as you fall into a deeper sleep
Night Terrors (not nightmares) can occur in stages 3 and 4
Stages 3 and 4 make deep sleep

13. Stage 4: Stage of deepest sleep – hard to awaken during this stage
By the time you reach this stage, you have been asleep about 1 hour
You remain in this stage for about 30 minutes, then move back to 3, then to 2, then to 1 (relatively quick return)

14. REM Stage: Rapid Eye Movement
Breathing becomes irregular, blood pressure rises, heart beats faster
Dreams occur during REM
First dream lasts about 10 minutes
Last dream lasts about 30 minutes
REM takes place every 90 minutes from the time you fall asleep until morning
Body becomes paralyzed so it doesn’t try to act out the dreams.

15. REM Stage Stabilizes emotions Catalogues and stores memories
Restores the body and makes new cells, restores chemicals used by the brain during the day.
W/out:
Less attentive
More anxious
More irritable
Difficulty learning

16. Stage 1
Awake
Stage 1
Stage 2,3, 4