Chapter 4 Blue - Consciousness: Sleep, Dreams, Hypnosis,...

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Consciousness: Sleep, Dreams, Hypnosis, and Drugs Chapter 4
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Chapter 4 Learning Objective Menu LO 4.1 Consciousness and levels of consciousness LO 4.2 Why sleep and how sleep works LO 4.3 Stages of sleep and dreaming LO 4.4 Sleep disorders and normal sleep LO 4.5 Why people dream and what they dream about LO 4.6 Hypnosis and how it works LO 4.7 Physical and psychological dependence on a drug LO 4.8 How do stimulant and depressants affect consciousness LO 4.9 Dangers of narcotics, hallucinogens and marijuana
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Consciousness Consciousness - a person’s awareness of everything that is going on around him or her at any given moment. Waking consciousness - state in which thoughts, feelings, and sensations are clear, organized, and the person feels alert. Altered state of consciousness - state in which there is a shift in the quality or pattern of mental activity as compared to waking consciousness. LO 4.1 Consciousness and levels of consciousness Menu
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Necessity of Sleep Circadian rhythm - a cycle of bodily rhythm that occurs over a 24-hour period. “circa” – about “diem” – day Hypothalamus – tiny section of the brain that influences the glandular system. suprachiasmatic nucleus – deep within the hypothalamus; the internal clock that tells people when to wake up and when to fall asleep. Tells pineal gland to secrete melatonin, which makes a person feel sleepy. LO 4.2 Why sleep and how sleep works Menu
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Necessity of Sleep Microsleeps - brief sidesteps into sleep lasting only a few seconds. Sleep deprivation - any significant loss of sleep, resulting in problems in concentration and irritability. Menu LO 4.2 Why sleep and how sleep works
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Necessity of Sleep Adaptive theory - theory of sleep proposing that animals and humans evolved sleep patterns to avoid predators by sleeping when predators are most active. Restorative theory - theory of sleep proposing that sleep is necessary to the physical health of the body and serves to replenish chemicals and repair cellular damage. Menu LO 4.2 Why sleep and how sleep works
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Menu LO 4.2 Why we sleep and how sleep works
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Brain Wave Patterns Electroencephalograph (EEG) - allows scientists to see the brain wave activity as a person passes through the various stages of sleep and to determine what type of sleep the person has entered. Alpha waves - brain waves that indicate a state of relaxation or light sleep. Theta waves
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Chapter 4 Blue - Consciousness: Sleep, Dreams, Hypnosis,...

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