chapter 5: states of consciousness
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Chapter 5: States of Consciousness. Some Early Definitions. Consciousness: All the sensations, perceptions, memories, and feelings you are aware of in any instant Waking Consciousness: Normal, clear, organized, alert awareness - PowerPoint PPT PresentationTRANSCRIPT
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Chapter 5: States of Consciousness
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Some Early Definitions
• Consciousness: All the sensations, perceptions, memories, and feelings you are aware of in any instant– Waking Consciousness: Normal, clear,
organized, alert awareness• Altered State of Consciousness (ASC):
Awareness that is distinctly different in quality or pattern from waking consciousness
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Sleep
• Innate, biological rhythm• Microsleep: Brief shift in brain-wave patterns
similar to those of sleep• Sleep Deprivation: Sleep loss; being
deprived of needed amounts of sleep• Sleep-Deprivation Psychosis: Major
disruption of mental and emotional functioning that occurs because of sleep loss
• Hypersomnia: Excessive daytime sleepiness
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Measuring Sleep Changes
• Electroencephalograph (EEG): Brain-wave machine; amplifies and records electrical activity in the brain
• Beta Waves: Small fast waves associated with alertness and awakeness
• Alpha Waves: Large, slow waves associated with relaxation and falling asleep
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Stages of Sleep
• Stage 1: Small, irregular waves produced in light sleep (people may or may not say they were asleep)– Hypnic Jerk: Reflex muscle twitch
throughout body that may occur in Stage 1
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Stage 2
• Deeper sleep; sleep spindles (bursts of distinctive brain-wave activity) appear
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Stage 3
• Deeper sleep; Delta waves appear; very large and slow
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Stage 4
• Deepest level of normal sleep; almost purely Delta waves
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Kinds of Sleep
• Rapid Eye Movements (REM): Associated with dreaming; sleep is very light– Body is very still during REM sleep– Lack of muscle paralysis during REM sleep
is called “REM Behavioral Disorder”• Non-REM (NREM) Sleep: Occurs during
stages 1, 2, 3, and 4; no rapid eye movement occurs– Seems to help us recover from daily
fatigue
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Sleep Disturbances
• Insomnia: Difficulty in getting to sleep or staying asleep, or waking early– Sleeping pills exacerbate insomnia; cause
decrease in REM and Stage 4 sleep and may cause dependency
• Drug-Dependency Insomnia: Sleeplessness that follows withdrawal from sleeping pills
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Types and Causes of Insomnia
• Temporary Insomnia: Brief period of sleeplessness caused by worry, stress, and excitement.– Avoid fighting it and read a book, for
example, until you’re struggling to stay awake.
• Chronic Insomnia: Exists if sleeping troubles last for more than three weeks.– Adopt regular schedule; go to bed at the
same time each night, for example.
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Sleep Disturbances
• Sleepwalking (Somnambulism): Occurs in NREM sleep during Stages 3 and 4
• Sleeptalking: Speaking while asleep; occurs in NREM sleep
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Nightmares
• Bad dreams that occur during REM sleep • Imagery Rehearsal: Mentally rehearse the
changed dream before you go to sleep again; may help to eliminate nightmares
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Night Terrors
• Total panic and hallucinations may occur– Occurs during Stage 4 sleep– Most common in childhood; may occur in
adults
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Sleep Apnea
• Interrupted breathing during sleep; cause of very loud snoring– Hypersomnia: Extreme daytime
sleepiness– Apnea can be treated by
• Surgery• Weight loss• Breathing mask
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Sudden Infant Death Syndrome
• Also known as SIDS or Crib Death; Sudden, unexplained death of healthy infant (infants should sleep on back or on side to try to prevent)
• SIDS babies have a weak arousal reflex; prevents them from changing positions and resuming breathing after an apnea episode
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REM Rebound
• Extra rapid eye movement sleep following REM sleep deprivation
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Psychodynamic (Freudian) Theory of Dreaming
• Emphasizes internal conflicts, motives, and unconscious forces
• Wish Fulfillment: Freudian belief that many dreams are expressions of unconscious desires– Much evidence to refute this
• Dream Symbols: Images that have a deeper symbolic meaning
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Activation-Synthesis Hypothesis
• Dream content may be affected by motor commands in the brain (that occur during sleep) that are not carried out
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Hypnosis
• Altered state of consciousness characterized by intensely narrowed attention and increased openness to suggestion– Mesmer: Believed he could cure diseases
by passing magnets over body; true “animal magnetism” (“mesmerize” means to hypnotize)
– Must cooperate to become hypnotized
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Hidden Observer
• Detached part of hypnotized person’s awareness that silently observes events
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Hypnosis Can
• Help people relax• Reduce pain• Get people to make better progress in
therapy
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Hypnosis Cannot
• Produce acts of superhuman strength• Produce age regression• Force you to do things against your will
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Stage Hypnosis
• Simulation of hypnotic effects
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Tricks of the Trade
• Waking Suggestibility: People on stage do not want to spoil the act, so they will follow any instruction.
• Selection of Responsive Subjects: Any “volunteer” who does not get hypnotized in the stage group and does not follow instructions is “voted off.”
• The Hypnosis Label Disinhibits: On stage, once you are “in a hypnotic trance,” your responsibility for actions is removed; you can do whatever you want!
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More Stage Hypnosis “Tricks of the Trade”
• Hypnotist as Director: Once they are in a trance, the “volunteers” are suddenly the show’s stars, and they will act like it. The hypnotists only need to direct them.
• Stage Hypnotists Use Tricks: Stage hypnosis is 50% deception and 50% taking advantage of the situation
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More Hypnosis Concepts
• Hypnotic Susceptibility: How easily a person can be hypnotized
• Basic Suggestion Effect: Tendency of hypnotized people to carry out suggested actions as though they were involuntary
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Meditation
• Mental exercise designed to produce relaxation or heightened awareness
• Concentrative Meditation: Attention is paid to a single focal point (i.e., object, thought, etc.)– Produces relaxation response and thus
works to reduce stress• Mindfulness Meditation: Based on widening
attention span to become aware of everything experienced at a given moment
• Mantra: Word(s) or sound(s) repeated during concentrative meditation
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Relaxation Response
• Occurs at time of relaxation; internal response that prevents activation of adrenal glands
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Sensory Deprivation (SD)
• Any major reduction in amount or variety of sensory stimulation
• Benefits– Sensory enhancement– Relaxation– Changing habits
• REST: Restricted Environmental Stimulation Therapy: Makes it easier to change bad habits
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Drugs and Altered States of Consciousness
• Psychoactive Drug: Substance capable of altering attention, judgment, memory, time sense, self-control, emotion, or perception
• Stimulant: Substance that increases activity in body and nervous system
• Depressant: Substance that decreases activity in body and nervous system
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Physical Dependence
• Physical Addiction based on drug tolerance and withdrawal symptoms– Drug Tolerance: Reduction in body’s
response to a drug– Withdrawal Symptoms: Physical illness
following withdrawal of the drug
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Psychological Dependence
• Drug dependence based on psychological or emotional needs– Usually crave drug– Can be as powerful as physiological
addiction
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Stimulants (Uppers)
• Amphetamines: Synthetic stimulants that excite the nervous system– Dexedrine and Methamphetamine are two
types of stimulants
• Amphetamine Psychosis: Loss of contact with reality because of amphetamine use; user tends to have paranoid delusions
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Cocaine
• Central Nervous System stimulant derived from leaves of coca plant; also used as local anesthetic– From 1886-1906, Coca-Cola did indeed
have cocaine in it!– Highly addictive drug– Anhedonia (Inability to Feel Pleasure):
Common after cocaine withdrawal
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MDMA (Ecstasy)
• Chemically similar to amphetamine; created by small variations in a drug’s structure– Risks of using MDMA are unclear– May cause severe liver damage – Repeated use damages serotonergic brain
cells
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Caffeine
• Most frequently used psychoactive drug in North America; present in colas, chocolate, coffee, and tea
• Causes hand tremors, sweating, talkativeness, tinnitus, suppresses fatigue or sleepiness, increases alertness– May be hazardous to pregnant women if
used excessively
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Caffeinism
• Physiological dependence on caffeine– Symptoms: Insomnia, irritability, loss of
appetite, chills, racing heart, elevated body temperature
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Nicotine
• Natural stimulant found mainly in tobacco; known carcinogen
• May cause stomach pain, vomiting, diarrhea, confusion, tremors
• Addictive• Sum: Don’t smoke; smoking kills (so does
chewing tobacco)
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Sedatives: Barbiturates
• Sedative drugs that depress brain activity– Seconal and Amytal are two types– Easy to overdose
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GHB (Gamma-Hydroxybutyrate)
• Central Nervous System (CNS) depressant that relaxes and sedates; combination of degreasing solvent and drain cleaner– Sedative effects may result in nausea, loss
of muscle control, and either sleep or a loss of consciousness
– Inhibits gag reflex, so some choke to death on their own vomit
– Addictive and deadly
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Sedatives: Tranquilizers
• Lower anxiety and reduce tension– Valium, Xanax, and Librium are three types– Rohypnol: Related to Valium; lowers
inhibitions and produces relaxation or intoxication. Larger doses can induce short-term amnesia and sleep• Date rape drug because it’s odorless
and tasteless• Drug Interaction: One drug increases the
effect of another
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Alcohol
• Ethyl Alcohol: Intoxicating element in fermented and distilled liquors– Not a stimulant but does lower inhibitions– Depressant
• Binge Drinking: Consuming five or more drinks in a short time; four or more for women– Serious sign of alcohol abuse
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Detoxification
• Withdrawal of the person from alcohol• Occurs in a medical setting and is tightly
controlled• Often necessary before long-term treatment
begins
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Alcoholics Anonymous (AA)
• Worldwide self-help organization composed of recovering alcoholics; emphasizes admitting powerlessness over alcohol usage and wanting to recover. – Spiritual component
• (Founded by a Swedenborgian)– Free; around for over 70 years!
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Some Hallucinogens
• Hallucinogen: Substance that alters or distorts sensory impressions
• Lysergic Acid Diethylamide (LSD): Hallucinogen that can produce hallucinations and other psychotic symptoms
• Mescaline (Peyote) and Psilocybin (Magic Mushrooms)
• PCP (Angel Dust): Initially can have hallucinogenic effects; also an anesthetic and has stimulant and depressant effects
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Marijuana
• Leaves and flowers of the hemp plant– Active chemical: THC– Effects: Relaxation, time distortion,
perceptual distortions
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Some Health Risks of Using Marijuana
• Increases risk of a variety of cancers, including prostate and cervical cancer
• Can suppress immune system, perhaps increasing risk of disease
• Activity levels in the cerebellum are lower than normal in pot users
• Pot may damage some of the brain’s memory centers
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Dream Interpretation: Freud
• Four dream processes (mental filters) that hide true purposes of dreams
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Condensation
• Combining several people, objects, or events into a single dream image
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Displacement
• Directing emotions or actions toward safe or unimportant dream images
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Symbolization
• Non-literal expression of dream content
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Secondary Elaboration
• Making a dream more logical and adding details while remembering it
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Dreams: Perls
• Most dreams are a special message about what is missing in our lives, what we avoid doing when awake, or feelings that we need to re-own
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Lucid Dreaming
• Person feels fully awake within the dream world and feels capable of normal thought and action
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