PSYA01H3 Lecture Notes - Lecture 15: Stage Hypnosis, Sensory Deprivation, Sleep-Learning
Lecture 15
Altered States of Consciousness
• Our previous discussion of consciousness was focused on the “normal conscious” experience of
an awake, sober, self-controlled individual… but “normal” consciousness can be alter by:
1. Sleep
2. Hypnosis
3. Drugs
4. Sensory deprivation
The mystery of sleep: why do we sleep?
• Sometimes evolution-based arguments are too flexible
• One theory: sleep must be doing something very important, if not, we would adapt to try and
sleep less
• Another theory: evolution explains how sleep just keeps us out of trouble and conserving energy
Stages of Sleep
• When we developed an EEG, studying of sleep patterns became more prominent
• These pick up the electrical activities of the brain
• There are lots of electrical noise coming from the brain
•
• Their dreams may reflect the eye twitching
• When they are dreaming, they are experiencing something as if they were awake
• Somewhere around the end of stage 4, the brain releases chemicals that paralyzes the body
- Some people don’t have these chemicals that paralyzes the body
Document Summary
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