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Psychology Chapter on Sleep, Dreams, Hypnosis and Drugs
1.
psychology CHAPTER Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White third edition consciousness: sleep, dreams, hypnosis and drugs 4
2.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Learning Objectives • LO 4.1Consciousness and levels of consciousness • LO 4.2Why sleep and how sleep works • LO 4.3 Stages of sleep and dreaming • LO 4.4Sleep 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 • LO 4.10What are hypnogogic and hypnopompic hallucinations
3.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White 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. LO 4.1 Consciousness and levels of consciousness
4.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Consciousness • 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
5.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Necessity of Sleep • Circadian rhythm - a cycle of bodily rhythm that occurs over a 24-hour period. – "circa" – about – "diem" – day LO 4.2 Why sleep and how sleep works
6.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Necessity of Sleep • 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
7.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White 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. LO 4.2 Why sleep and how sleep works
8.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White 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. LO 4.2 Why sleep and how sleep works
9.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Necessity of Sleep • 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. LO 4.2 Why sleep and how sleep works
10.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White 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 - brain waves indicating the early stages of sleep. Delta waves - long, slow waves that indicate the deepest stage of sleep. LO 4.2 Why sleep and how sleep works
11.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Figure 4.1 Sleep Patterns of Infants and Adults Infants need far more sleep than older children and adults. Both REM sleep and NREM sleep decrease dramatically in the first 10 years of life, with the greatest decrease in REM sleep. Nearly 5 0 percent of an infant’s sleep is REM, compared to only about 20 percent for a normal, healthy adult. (Roffwarg, 19 6 6 )
12.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Stages of Sleep • Rapid eye movement (REM) - stage of sleep in which the eyes move rapidly under the eyelids and the person is typically experiencing a dream. • NREM (non-REM) sleep - any of the stages of sleep that do not include REM. LO 4.3 Stages of sleep and dreaming
13.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Stages of Sleep • Non-REM Stage One – light sleep. – May experience: hypnagogic images – vivid visual events. hypnic jerk – knees, legs, or whole body jerks. • Non-REM Stage Two – sleep spindles (brief bursts of activity only lasting a second or two). LO 4.3 Stages of sleep and dreaming
14.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Stages of Sleep • Non-REM Stages Three and Four – delta waves pronounced. – Deep sleep – when 50%+ of waves are delta waves. LO 4.3 Stages of sleep and dreaming
15.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Figure 4.2 Brain Activity During Sleep The EEG reflects brain activity during both waking and sleep. This activity varies according to level of alertness while awake (top two segments) and the stage of sleep (middle segments). Sleep Stages 3 and 4 are indicated by the presence of delta activity, which is much slower and accounts for the larger, slower waves on these graphs.
16.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Figure 4.2 (continued) Brain Activity During Sleep [NOTE: The American Academy of Sleep Medicine (Iber et al., 2007) has recently published updated guidelines for the scoring of sleep activity and one major change has been to combine NREM stages 3 and 4 into a single stage, now indicated by N3.] REM has activity that resembles alert wakefulness but has relatively no muscle activity except rapid eye movement. The bottom segments illustrate how EEG activity differs between wakefulness, light and deep sleep, and lastly what it looks like when brain activity has ceased in cerebral death. EEG data and images in this figure are courtesy of Dr. Leslie Sherlin.
17.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Figure 4.3 A Typical Night’s Sleep The graph shows the typical progression through the night of Stages 1–4 and REM sleep. Stages 1–4 are indicated on the y-axis, and REM stages are represented by the green curves on the graph. The REM periods occur about every 90 minutes throughout the night (Dement, 1974).
18.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White REM Sleep and Dreaming • REM sleep is paradoxical sleep (high level of brain activity). • If wakened during REM sleep, almost always report a dream. • REM rebound - increased amounts of REM sleep after being deprived of REM sleep on earlier nights. LO 4.3 Stages of sleep and dreaming
19.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Sleep Disorders • Nightmares – Bad dreams occurring during REM sleep. • REM behavior disorder – A rare disorder in which the mechanism that blocks the movement of the voluntary muscles fails, allowing the person to thrash around and even get up and act out nightmares. LO 4.4 Sleep disorders and normal sleep
20.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Stage Four Sleep Disorders • Sleepwalking (somnambulism) – Occurring during deep sleep, an episode of moving around or walking around in one’s sleep. Sleepwalking is more common among children than adults. Although this young girl may appear to be awake, she is still deeply asleep. When she awakens in the morning, she will have no memory of this sleepwalking episode. LO 4.4 Sleep disorders and normal sleep
21.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Stage Four Sleep Disorders • Night terrors – Relatively rare disorder in which the person experiences extreme fear and screams or runs around during deep sleep without waking fully. LO 4.4 Sleep disorders and normal sleep
22.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Sleep Disorders • Can Sleepwalking be a Crime Defense? – Kenneth Parks case – Scott Falater case – Brian Thomas case LO 4.4 Sleep disorders and normal sleep
23.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Problems During Sleep • Insomnia - the inability to get to sleep, stay asleep, or get a good quality of sleep. • Sleep apnea - disorder in which the person stops breathing for nearly half a minute or more. – Continuous positive airway pressure device. LO 4.4 Sleep disorders and normal sleep
24.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Problems During Sleep • Narcolepsy - sleep disorder in which a person falls immediately into REM sleep during the day without warning. – Cataplexy – sudden loss of muscle tone. LO 4.4 Sleep disorders and normal sleep
25.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White
26.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Dreams • Freud – dreams as wish fulfillment. – Manifest content – the actual dream itself. – Latent content – the true, hidden meaning of a dream. LO 4.5 Why people dream and what they dream about
27.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Dreams • Activation-synthesis hypothesis - explanation that states that dreams are created by the higher centers of the cortex to explain the activation by the brain stem of cortical cells during REM sleep periods. LO 4.5 Why people dream and what they dream about
28.
Copyright ©2012 by
Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Dreams • Activation-information-mode model (AIM) - revised version of the activation-synthesis explanation of dreams in which information that is accessed during waking hours can have an influence on the synthesis of dreams. LO 4.5 Why people dream and what they dream about
29.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Hypnosis • Hypnosis - state of consciousness in which the person is especially susceptible to suggestion. LO 4.6 Hypnosis and how it works
30.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Hypnosis • Four Elements of Hypnosis: – The hypnotist tells the person to focus on what is being said. – The person is told to relax and feel tired. – The hypnotist tells the person to "let go" and accept suggestions easily. – The person is told to use vivid imagination. • Hypnotic susceptibility – degree to which a person is a good hypnotic subject. LO 4.6 Hypnosis and how it works
31.
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32.
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33.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Theories of Hypnosis • Hypnosis as dissociation – hypnosis works only in a person’s immediate consciousness, while a hidden "observer" remained aware of all that was going on. • Social-cognitive theory of hypnosis - theory that assumes that people who are hypnotized are not in an altered state but are merely playing the role expected of them in the situation. LO 4.6 Hypnosis and how it works
34.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Psychoactive Drugs • Psychoactive drugs - drugs that alter thinking, perception, and memory. • Physical Dependence – Tolerance – more and more of the drug is needed to achieve the same effect. – Withdrawal - physical symptoms that can include nausea, pain, tremors, crankiness, and high blood pressure, resulting from a lack of an addictive drug in the body systems. LO 4.7 Physical and psychological dependence on drugs
35.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Psychoactive Drugs • Psychological dependence - the feeling that a drug is needed to continue a feeling of emotional or psychological well-being. LO 4.7 Physical and psychological dependence on drugs
36.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Stimulants • Stimulants - drugs that increase the functioning of the nervous system. – Amphetamines – drugs that are synthesized (made in labs) rather than found in nature. – Cocaine – natural drug; produces euphoria, energy, power, and pleasure. – Nicotine - active ingredient in tobacco. LO 4.8 Stimulants and depressants
37.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Stimulants • Stimulants - drugs that increase the functioning of the nervous system. – Caffeine - the stimulant found in coffee, tea, most sodas, chocolate, and even many over- the-counter drugs. LO 4.8 Stimulants and depressants
38.
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39.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Nicotine • The harmful effects of nicotine are now well known, but many people continue to smoke or chew tobacco in spite of warnings. LO 4.8 Stimulants and depressants
40.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Depressants • Depressants - drugs that decrease the functioning of the nervous system. – Barbituates – depressant drugs that have a sedative effect. – Benzodiazepines - drugs that lower anxiety and reduce stress. – Rohypnol – the "date rape" drug. LO 4.8 Stimulants and depressants
41.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Alcohol • Alcohol - the chemical resulting from fermentation or distillation of various kinds of vegetable matter. – Often confused as a stimulant but actually a depressant on CNS. LO 4.8 Stimulants and depressants
42.
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43.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Table 4.5 (continued) Blood Alcohol Level and Behavior Associated With Amounts of Alcohol
44.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Narcotics • Narcotics – A class of opium-related drugs that suppress the sensation of pain by binding to and stimulating the nervous system’s natural receptor sites for endorphins. Opium - substance derived from the opium poppy from which all narcotic drugs are derived. Morphine - narcotic drug derived from opium, used to treat severe pain. Heroin - narcotic drug derived from opium that is extremely addictive. LO 4.9 Dangers of narcotics, hallucinogens and marijuana
45.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Hallucinogens • Psychogenic drugs – Drugs including hallucinogens and marijuana that produce hallucinations or increased feelings of relaxation and intoxication. Hallucinogens - drugs that cause false sensory messages, altering the perception of reality. LSD (lysergic acid diethylamide) - powerful synthetic hallucinogen. PCP - synthesized drug now used as an animal tranquilizer that can cause stimulant, depressant, narcotic, or hallucinogenic effects. LO 4.9 Dangers of narcotics, hallucinogens and marijuana
46.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Hallucinogens • Psychogenic drugs – Drugs including hallucinogens and marijuana that produce hallucinations or increased feelings of relaxation and intoxication. MDMA (Ecstasy or X) - designer drug that can have both stimulant and hallucinatory effects. Stimulatory hallucinogenics – drugs that produce a mixture of psychomotor stimulant and hallucinogenic effects. Mescaline - natural hallucinogen derived from the peyote cactus buttons. LO 4.9 Dangers of narcotics, hallucinogens and marijuana
47.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Hallucinogens • Psychogenic drugs – Drugs including hallucinogens and marijuana that produce hallucinations or increased feelings of relaxation and intoxication. Psilocybin - natural hallucinogen found in certain mushrooms. LO 4.9 Dangers of narcotics, hallucinogens and marijuana
48.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Marijuana • Marijuana (pot or weed) - mild hallucinogen derived from the leaves and flowers of a particular type of hemp plant. – This woman is preparing a cannabis (marijuana) cigarette. Cannabis is reported to relieve pain in cases of multiple sclerosis and chronic pain from nerve damage. Such use is controversial as cannabis is classified as an illegal drug in some countries. LO 4.9 Dangers of narcotics, hallucinogens and marijuana
49.
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50.
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Pearson Education, Inc. All rights reserved. Psychology, Third Edition Saundra K. Ciccarelli • J. Noland White Hallucinations • Hypnogogic hallucinations • Hypnopompic hallucinations LO 4.10 What are hypnogogic and hypnopompic hallucinations
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