The document discusses different stages of sleep including REM sleep and factors that influence sleep cycles such as light, routine, and disruptions. It notes that REM sleep occurs 4-6 times per night and increases throughout the night as deep sleep decreases. Lack of REM sleep can cause irritability, tiredness, and REM rebound. The purposes of sleep include restoring energy, safety while asleep, problem solving during dreams, cleansing and repair of the body, and removing unwanted thoughts. Genetics and personal traits and habits influence individual sleep needs.

1. Chapter 5 SLEEP
165-172
Mrs. Limoges
AP Psychology
North High

2. Daydream
Youth
Adult/elderly
• Plan
• Solve problems

3. • White bear:
–difficult to suppress
–embrace thought to get it out
• THIS IS WHY I DON’T DIET

4. Sleep
awake
asleep
2/3
1/3

5. Sleep
• 24 hour cycle (…more like 25)
• Suprachiasmatic nucleus (hypothalamus)
– Light
– Routine (soccer practice)
– Disruptions (jet lag)

6. Aserinsky: REM
• Used his son 
• Discovered brain wave pattern of
REM
– 90 minute cycle
– Vivid cognitions
– Sleep paralysis
– Evolutionary advantage?

7. Theta
Sleep spindle
Delta
Delta

8. REM
• 4-6 times per night
• Throughout the night:
– Deep sleep decreases as REM increases
• No REM?
– Irritable
– Tired
– REM rebound

9. Why Sleep?
Energy
Safety
Problem Solving
Cleansing
Repair
Take out the mental trash

10. Need
• Genetics, yes (Basis)
• Personal traits and habits (shape)
• Exercise increases deep sleep, not REM
Energetic
Extroverted
Nervous
Creative
Non-conforming