States of Consciousness Myers’ PSYCHOLOGY Chapter 7 States of Consciousness Worth Publishers

Waking Consciousness Consciousness our awareness of ourselves and our environments

Sleep and Dreams Biological Rhythms Circadian Rhythm 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

Sleep and Dreams REM (Rapid Eye Movement) Sleep 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

Sleep and Dreams Measuring sleep activity

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

Stages in a Typical Night’s Sleep 1 2 3 4 5 6 7 Sleep stages Awake Hours of sleep REM

Stages in a Typical Night’s Sleep Hours of sleep Minutes of Stage 4 and REM 1 2 3 4 5 6 7 8 10 15 20 25 Decreasing Stage 4 Increasing

Sleep Deprivation Effects of Sleep Loss fatigue impaired concentration depressed immune system greater vulnerability to accidents

Sleep Deprivation Spring time change (hour sleep loss) 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

Sleep Disorders Insomnia Narcolepsy Sleep Apnea persistent problems in falling or staying asleep Narcolepsy uncontrollable sleep attacks Sleep Apnea temporary cessation of breathing momentary reawakenings

Night Terrors and Nightmares 1 2 3 4 5 6 7 Sleep stages Awake Hours of sleep REM Night Terrors occur within 2 or 3 hours of falling asleep, usually during Stage 4 high arousal-- appearance of being terrified

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

Dreams: Freud Sigmund Freud--The Interpretation of Dreams (1900) wish fulfillment discharge otherwise unacceptable feelings Manifest Content remembered story line Latent Content underlying meaning

Dreams As Information Processing REM Rebound helps facilitate memories REM sleep increases following REM sleep deprivation

Sleep Across the Lifespan

Hypnosis Hypnosis Posthypnotic Amnesia 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

Hypnosis Unhypnotized persons can also do this

Hypnosis Orne & Evans (1965) Posthypnotic Suggestion 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

Hypnosis Dissociation Hidden Observer 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

Explaining Hypnosis

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

Dependence and Addiction Small Large Drug dose Little effect Big Drug Response to first exposure After repeated exposure, more drug is needed to produce same effect Tolerance diminishing effect with regular use Withdrawal discomfort and distress that follow discontinued use

Psychoactive Drugs Depressants Stimulants 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

Psychoactive Drugs Hallucinogens psychedelic (mind-manifesting) drugs that distort perceptions and evoke sensory images in the absence of sensory input LSD

Psychoactive Drugs Barbiturates drugs that depress the activity of the central nervous system, reducing anxiety but impairing memory and judgement

Psychoactive Drugs Opiates opium and its derivatives (morphine and heroin) opiates depress neural activity, temporarily lessening pain and anxiety

Psychoactive Drugs Amphetamines drugs that stimulate neural activity, causing speeded-up body functions and associated energy and mood changes

Cocaine Euphoria and Crash

Psychoactive Drugs Ecstasy (MDMA) LSD THC 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

Psychoactive Drugs

Trends in Drug Use Year 80% 70 60 50 High school seniors 40 reporting 1975 ‘77 ‘79 ‘81 ‘83 ‘85 ‘87 ‘89 ‘91 ‘93 ‘95 ‘97 ‘99 Year 80% 70 60 50 40 30 20 10 High school seniors reporting drug use Alcohol Marijuana/ hashish Cocaine

Perceived Marijuana Risk ‘75 ‘77 ‘79 ‘81 ‘83 ‘85 ‘87 ‘89 ‘91 ‘93 ‘95 ‘97 ‘99 Year 100% 90 80 70 60 50 40 30 20 10 Percent of twelfth graders Perceived “great risk of harm” in marijuana use Used marijuana