Psychology in Action (8e) by Karen Huffman

1. Psychology in Action (8e)byKaren Huffman Chapter 5: States of Consciousness Presented by: Mani Rafiee

2. Lecture Overview • Understanding Consciousness • Sleep and Dreams • Psychoactive Drugs • Healthier Ways to Alter Consciousness

3. Understanding Consciousness • Consciousness (an organism’s awareness of its own self and surroundings)

4. Understanding Consciousness • Alternate States of Consciousness (ASCs): mental states, other than ordinary waking consciousness, found during sleep, dreaming, psychoactive drug use, hypnosis, etc.

5. Sleep and Dreams: Circadian Rhythms • Circadian Rhythms (biological changes occurring on a 24-hour cycle) • Our energy level, mood, learning, and alertness all vary throughout the day. • Sections of the hypothalamus called the suprachiasmatic nucleus (SCN) and the pineal gland regulate these changes.

6. Sleep and Dreams: Circadian Rhythms (Continued) • Disrupted circadian rhythms, through shift work, jet lag,and sleep deprivation may cause mood alterations, reduced concentration and motivation, increased irritability, lapses in attention, and reduced motor skills.

7. What happens to humans and other animals while we sleep and dream? Sleep and Dreams

8. Sleep and Dreams: Stages of Sleep • NREM (Non-Rapid-Eye-Movement) Sleep: • Stage 1(lightest sleep) • Stage 2 (deeper sleep) • Stages 3 and 4 (deepest sleep) • REM (Rapid-Eye-Movement) Sleep: • Light sleep--also called paradoxical sleep

9. Sleep and Dreams: Stages of Sleep (Continued) • NREM (non-REM) sleep • Includes Stages 1 through 4 • Lower-frequency brain waves, decreased pulse and breathing,and occasional, simple dreams • Serves a biological need (NREM needs met before REM needs)

10. Sleep and Dreams: Stages of Sleep (Continued) • REM (Rapid-Eye-Movement) sleep • Also called paradoxical sleep • High-frequency brain waves, increased pulse and breathing, paralysis of the large muscles, and dreaming • Serves a psychological need and may help with learning and consolidating new memories

11. Sleep and Dreams: Stages of Sleep in a Typical Night

12. How scientists study sleep (note the EEG, EOG, and EMG measuring devices) Sleep and Dreams: Research

13. Sleep and Dreams: Stages of Sleep & Brain Waves

14. Sleep and Dreams: Over the Life Span

15. Sleep and Dreams: Average Daily Hours of Sleep for Different Mammals

16. Sleep and Dreams: Why Do We Sleep? • Repair/restoration theory: sleep helps us recuperate from daily activities • Evolutionary/circadian theory:sleep evolved to conserve energy and as protection from predators • Cognitive theory:dreams are an important part of information processing of everyday experiences

17. Sleep and Dreams: Why Do We Dream? • Psychoanalytic theory: dreams are disguised symbols (manifestversuslatent content) of repressed desires and anxieties • Biological theory: (activation-synthesis hypothesis) dreams are simple by-products of random stimulation of brain cells

18. Sleep and Dreams: Sleep Disorders Two major categories: • Dyssomnias (problems in amount, timing, and quality of sleep) • Parasomnias (abnormal disturbances during sleep)

19. Sleep and Dreams: Three Forms of Dyssomnias • Insomnia: persistent problems in falling asleep, staying asleep, or awakening too early • Sleep apnea: repeated interruption of breathing during sleep • Narcolepsy: sudden and irresistible onsets of sleep during normal waking hours

20. Sleep and Dreams: Two Forms of Parasomnias • Nightmares: anxiety-arousing dreams occurring near the end of sleep, during REM sleep • Night terrors: abrupt awakenings from NREM sleep accompanied by intense physiological arousal and feelings of panic

21. Psychoactive Drugs: Important Terms 1. Psychoactive Drugs(chemicals that change conscious awareness, mood, or perception) 2. Drug Abuse(drug taking that causes emotional or physical harm to the individual or others) 3. Addiction (compulsion to use a specific drug or engage in a certain activity) 4. Psychological Dependence(desire or craving to achieve the effects produced by a drug)

22. Psychoactive Drugs: Important Terms (Continued) • Physical Dependence(bodily processes have been so modified by repeated drug use that continued use is required to prevent withdrawal symptoms) 6. Withdrawal(discomfort and distress experienced after stopping the use of addictive drugs) 7. Tolerance(decreased sensitivity to a drug brought about by its continuous use)

23. Psychoactive Drugs: Four Categories 1.Depressants:act on the CNS to suppress bodily processes (e.g., alcohol, valium)

24. Psychoactive Drugs: Four Categories (Continued) 2.Stimulants:act on the CNS to increase bodily processes (e.g., caffeine, nicotine, cocaine)

25. A hidden danger of stimulants. The key ingredient in methamphetamine destroys the teeth and gums of chronic users. Psychoactive Drugs: Four Categories (Continued)

26. Psychoactive Drugs: Four Categories (Continued) 3.Opiates:act as an analgesic or pain reliever (e.g., morphine, heroin)

27. Psychoactive Drugs: Four Categories (Continued) 4.Hallucinogens: produce sensory or perceptual distortions called hallucinations (e.g., LSD, marijuana)

28. Healthier Ways to Alter Consciousness • Meditation(group of techniques designed to refocus attention, block out all distractions, and produce an ASC)

29. Hypnosis (trancelike state of heightened suggestibility, deep relaxation, and intense focus) Healthier Ways to Alter Consciousness

30. Therapeutic uses of hypnosis: treatment of chronic pain, severe burns, dentistry, childbirth, psychotherapy. Healthier Ways to Alter Consciousness