chapter 7 states of consciousness. waking consciousness consciousness our awareness of ourselves...
TRANSCRIPT
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Chapter 7
States of Consciousness
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Waking Consciousness
Consciousness our
awareness of ourselves and our environments
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Sleep and Dreams
Biological Rhythms periodic physiological fluctuations
Circadian Rhythm
the biological clock regular bodily rhythms that occur
on a 24-hour cycle, such as of wakefulness and body temperature
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Sleep and Dreams
REM (Rapid Eye Movement) Sleep recurring sleep stage vivid dreams “paradoxical sleep”
muscles are generally relaxed, but other body systems are active
Sleep periodic, natural, reversible loss of
consciousness
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Sleep and Dreams Measuring sleep activity
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Brain Waves and Sleep Stages
Alpha Waves slow waves of a
relaxed, awake brain
Delta Waves large, slow waves
of deep sleep Hallucinations
false sensory experiences
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Stages in a Typical Night’s Sleep
0 1 2 3 4 5 6 7
4
3
2
1
Sleepstages
Awake
Hours of sleep
REM
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Sleep Deprivation
Effects of Sleep Loss fatigue impaired
concentration depressed
immune system greater
vulnerability to accidents
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Sleep Disorders
Insomnia persistent problems in falling or
staying asleep Narcolepsy
uncontrollable sleep attacks Sleep Apnea
temporary cessation of breathing momentary reawakenings
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Night Terrors and Nightmares
Night Terrors occur within 2
or 3 hours of falling asleep, usually during Stage 4
high arousal-- appearance of being terrified
0 1 2 3 4 5 6 7
4
3
2
1
Sleepstages
Awake
Hours of sleep
REM
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Dreams: Freud
Dreams sequence of images, emotions, and
thoughts passing through a sleeping person’s mind
hallucinatory imagery discontinuities incongruities delusional acceptance of the content difficulties remembering
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Dreams: Freud
Sigmund Freud--The Interpretation of Dreams (1900) wish fulfillment discharge otherwise unacceptable
feelings Manifest Content
remembered story line Latent Content
underlying meaning
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Dreams
As Information Processing helps facilitate memories
REM Rebound REM sleep increases following
REM sleep deprivation
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Hypnosis
Hypnosis a social interaction in which one
person (the hypnotist) suggests to another (the subject) that certain perceptions, feelings, thoughts, or behaviors will spontaneously occur
Posthypnotic Amnesia supposed inability to recall what one
experienced during hypnosis induced by the hypnotist’s suggestion
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Hypnosis
Un-hypnotized persons can
also do this
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Hypnosis
Orne & Evans (1965) control group instructed to “pretend” unhypnotized subjects performed the
same acts as the hypnotized ones Posthypnotic Suggestion
suggestion to be carried out after the subject is no longer hypnotized
used by some clinicians to control undesired symptoms and behaviors
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Hypnosis
Dissociation a split in consciousness allows some thoughts and behaviors to
occur simultaneously with others Hidden Observer
Hilgard’s term describing a hypnotized subject’s awareness of experiences, such as pain, that go unreported during hypnosis
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Explaining Hypnosis
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Drugs and Consciousness
Psychoactive Drug a chemical substance that alters
perceptions and mood Physical Dependence
physiological need for a drug marked by unpleasant withdrawal
symptoms Psychological Dependence
a psychological need to use a drug for example, to relieve negative emotions
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Dependence and Addiction
Tolerance diminishing effect
with regular use Withdrawal
discomfort and distress that follow discontinued use
Small Large
Drug dose
Littleeffect
Bigeffect
Drugeffect
Response tofirst exposure
After repeatedexposure, moredrug is neededto produce same effect
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Psychoactive Drugs
Depressants drugs that reduce neural activity slow body functions
alcohol, barbiturates, opiates
Stimulants drugs that excite neural activity speed up body functions
caffeine, nicotine, amphetamines, cocaine
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Psychoactive Drugs
Hallucinogens psychedelic (mind-
manifesting) drugs that distort perceptions and evoke sensory images in the absence of sensory input LSD
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Psychoactive Drugs
Barbiturates drugs that depress the
activity of the central nervous system, reducing anxiety but impairing memory and judgement
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Psychoactive Drugs
Opiates opium and its derivatives
(morphine and heroin) opiates depress neural
activity, temporarily lessening pain and anxiety
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Psychoactive Drugs
Amphetamines drugs that stimulate
neural activity, causing sped-up body functions and associated energy and mood changes
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Cocaine Euphoria and Crash
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Psychoactive Drugs
Ecstasy (MDMA) synthetic stimulant and mild hallucinogen both short-term and long-term health risks
LSD lysergic acid diethylamide a powerful hallucinogenic drug also known as acid
THC the major active ingredient in marijuana triggers a variety of effects, including mild
hallucinations
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Psychoactive Drugs
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Near-Death Experiences
Near-Death Experience an altered state of
consciousness reported after a close brush with death
often similar to drug-induced hallucinations
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Near-Death Experiences
Dualism the presumption that mind and body are two distinct entities that interact
Monism the presumption that mind and body are different aspects of the same thing