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Chapter 7 Waking and Sleeping Rhythms PowerPoint PPT Presentation


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Chapter 7 Waking and Sleeping Rhythms. Waking Consciousness. Consciousness our awareness of ourselves and our environments. Sleep and Dreams. Biological Rhythms periodic physiological fluctuations Circadian Rhythm the biological clock

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Chapter 7 Waking and Sleeping Rhythms

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Chapter 7 waking and sleeping rhythms

Chapter 7

Waking and Sleeping Rhythms


Waking consciousness

Waking Consciousness

  • Consciousness

    • our awareness of ourselves and our environments


Sleep and dreams

Sleep and Dreams

  • Biological Rhythms

    • periodic physiological fluctuations

  • Circadian Rhythm

    • the biological clock

    • regular bodily rhythms, such as of wakefulness and body temperature, that occur on a 24-hour cycle


Premenstrual syndrome

Premenstrual Syndrome

3

Recalled mood is

worse than

earlier reported

Negative mood

score

2

1

Premenstrual Menstrual Intermenstrual

Menstrual phase

Recalled mood

Actual


Sleep and dreams1

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


Sleep and dreams2

Sleep and Dreams

  • Measuring sleep activity


Brain waves and sleep stages

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

Awake

Sleep

stages

1

2

3

REM

4

0

1

2

3

4

5

6

7

Hours of sleep

Stages in a Typical Night’s Sleep


Stages in a typical night s sleep1

Minutes

of

Stage 4 and

REM

Decreasing

Stage 4

25

20

15

Increasing

REM

10

5

0

1

2

5

6

7

8

3

4

Hours of sleep

Stages in a Typical Night’s Sleep


Sleep deprivation

Sleep Deprivation

  • Effects of Sleep Loss

    • fatigue

    • impaired concentration

    • depressed immune system

    • greater vulnerability to accidents


Sleep deprivation1

Accident

frequency

More sleep,

fewer accidents

Less sleep,

more accidents

2,800

2,700

4,200

2,600

4000

2,500

3,800

2,400

3,600

Spring time change

(hour sleep loss)

Fall time change

(hour sleep gained)

Monday before time change

Monday after time change

Sleep Deprivation


Sleep disorders

Sleep Disorders

  • Insomnia

    • persistent problems in falling or staying asleep

  • Narcolepsy

    • uncontrollable sleep attacks

  • Sleep Apnea

    • temporary cessation of breathing during sleep

    • momentary reawakenings


Night terrors and nightmares

Sleep

stages

Awake

1

2

3

REM

4

0

1

2

3

4

5

6

7

Hours of sleep

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


Dreams freud

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 freud1

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

Dreams

  • As Information Processing

    • helps facilitate memories

  • As a Physiological Function

    • periodic brain stimulation

  • REM Rebound

    • REM sleep increases following REM sleep deprivation


Sleep across the lifespan

Sleep Across the Lifespan


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