Sleep. Interesting Statistics 77% adolescents go to bed after 10pm 84% get up before 7am 50% need an...
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Transcript of Sleep. Interesting Statistics 77% adolescents go to bed after 10pm 84% get up before 7am 50% need an...
Sleep
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
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.
Interesting stats
• 2/3 teens do not get enough sleep
• 70 million Americans have sleep problems
• 35 million Americans suffer from a sleep disorder
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
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)
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
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
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)
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 30-40 minutes.
Stage 2:
• Brain moves to the slowest pattern of brain waves – delta waves
• Spindles may also occur – rapid bursts of activity
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
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)
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.
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
Awake
Stage 1
Stage 1
Stage 2,3, 4