1. The Adaptation of Sleep
ARE YOU DREAMING?
The Adaptation of Sleep

2. Generating Questions Sleep Dreams What do you think?
Why do humans dream?

3. 3. Combination of physiology & psychology
Current Theories
1. Physiological stimulations
2. Psychologically necessary
3. Combination of physiology & psychology

4. Dream Facts 5 to 20 minutes Not just black and white
Several dreams a night
People blind from birth dream with other senses
When people are snoring, they're not dreaming.
Elephants sleep standing up during non-REM sleep, but lie down for REM sleep.”

5. Effects of too little sleep
Skipping one night's sleep…cranky/clumsy
Two nights of no sleep…problems thinking/doing normal tasks
Five nights without sleep…hallucinations
Eventually…brain cannot give directions to the rest of the body

6. Sleep Requirements

7. Voluntary or Involuntary?

8. Adaptation
Are sleep & dreaming adaptive?
Is human sleep unique?