States of consciousness - Part 1 Goals of the day waking consciousness sleep dreams.
MODULES 17 - 19 States of Consciousness. Waking Consciousness Consciousness our awareness of...
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Transcript of MODULES 17 - 19 States of Consciousness. Waking Consciousness Consciousness our awareness of...
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MODULES 17 - 19
States of Consciousness
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Waking Consciousness
Consciousness our awareness of ourselves and our environments
Biological Rhythms Circadian Rhythm
the biological clock
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Sleep and Dreams
REM (Rapid Eye Movement) Sleep recurring sleep stage vivid dreams “paradoxical sleep”
Sleep periodic, natural, reversible loss of
consciousness
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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 Deprivation
2,400
2,700
2,600
2,500
2,800
Spring time change(hour sleep loss)
3,600
4,200
4000
3,800
Fall time change(hour sleep gained)
Less sleep,more accidents
More sleep,fewer accidents
Monday before time change Monday after time change
Accident frequency
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Sleep Disorders
Insomnia persistent problems in falling or staying asleep
Narcolepsy uncontrollable sleep attacks
Sleep Apnea temporary cessation of breathing during sleep 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
seldom remembered
0 1 2 3 4 5 6 7
4
3
2
1
Sleepstages
Awake
Hours of sleep
REM
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Dreams: Sigmund 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: 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
As Information Processing helps facilitate memories
As a Physiological Function periodic brain stimulation
REM Rebound REM sleep increases following
REM sleep deprivation
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Sleep Across the Lifespan
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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
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Hypnosis
Posthypnotic Amnesia supposed inability to recall what
one experienced during hypnosis induced by the hypnotist’s
suggestion
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Hypnosis - Research
Orne & Evans (1965) hypnotized group told to dip hand in
fake acid, then throw the “acid” in assistant’s face
control group instructed to “pretend”
unhypnotized subjects performed the same acts as the hypnotized ones
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Hypnosis
Posthypnotic Suggestion suggestion to be carried out after
the subject is no longer hypnotized used by some clinicians to help
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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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 – reduce neural activity Alcohol Barbituates Opiates
Stimulants – excite neural activity Caffeine Nicotine Amphetamines Cocaine
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Cocaine Euphoria and Crash
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Psychoactive Drugs
Hallucinogens – psychedelic drugs
LSD Ecstasy THC
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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