states of consciousness n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
States of Consciousness PowerPoint Presentation
Download Presentation
States of Consciousness

Loading in 2 Seconds...

play fullscreen
1 / 16

States of Consciousness - PowerPoint PPT Presentation


  • 70 Views
  • Uploaded on

States of Consciousness. Chapter 5. The Sleep Cycle. Circadian Rhythm : Regular bodily rhythm that occurs on a 24-hour cycle Occurs in five stages Stage 1 Brief May experience hallucinations or falling sensation. Stage 2 About 20 minutes

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'States of Consciousness' - chenoa


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
the sleep cycle
The Sleep Cycle
  • Circadian Rhythm: Regular bodily rhythm that occurs on a 24-hour cycle
  • Occurs in five stages
    • Stage 1
      • Brief
      • May experience hallucinations or falling sensation
slide3

Stage 2

    • About 20 minutes
    • Characterized by periodic bursts of rapid, rhythmic brainwave activity
  • Stage 3
    • Brief, transitional
slide4

Stage 4

    • Brain emits large, slow delta waves
    • About 30 minutes
    • Hard to awaken
  • Leave non-REM sleep and ascend through Stages 3 and 2
slide5

REM sleep - rapid eye movement sleep

    • Rapid, irregular breathing and eye movements
    • Vivid dreams commonly occur
    • Essentially paralyzed
sleep cycle cont
Sleep Cycle -cont-
  • Repeats itself about every 90 minutes
  • Stage 4 gets briefer and REM and Stage 2 periods get longer
functions of sleep
Functions of Sleep
  • Protection
  • Restores and repairs brain tissue
  • Restores and rebuilds memories
  • Feeds creativity
  • Growth
problems of sleep deprivation
Problems of Sleep Deprivation
  • Can cause
    • Irritability
    • Slowed performance and reaction time
    • Impaired creativity, concentration and communication
    • Weight gain
    • Illness
  • Chronic sleep debt changes metabolic and hormonal functioning to mimic aging
sleep disorders
Sleep Disorders
  • Insomnia
    • Recurring problems in falling or staying asleep
    • Effects 1/10 adults
    • Treated with better sleep habits and prescription drugs
  • Narcolepsy - uncontrollable sleep attacks
    • Sleep attacks usually last less than 5 minutes
    • Effects 1/2000
    • Treated with prescription drugs
slide10

Sleep apnea - breathing temporarily stops during sleep

    • Associated with obesity
    • Effects 1/20
    • Treated with a CPAP air machine
  • Night terrors - occur during Stage 4 sleep
    • Child usually has no recollection of this happening and it disappears w/age
why do we dream
Why do we dream?
  • To satisfy our own wishes
    • Freud’s belief; not accepted by most psychologists
  • To file away memories
  • To develop and preserve neural pathways
  • To reflect cognitive development
hypnosis
Hypnosis
  • 20% of population is highly hypnotizable
  • Hypnosis cannot:
    • Enhance recall of forgotten events
    • Force people to act against their will
    • Help drug or alcohol addictions
  • Hypnosis can:
    • Help headaches, asthma, obesity and stress related skin disorders
    • Relieve pain
drugs and consciousness
Drugs and Consciousness
  • Misconceptions about addiction
    • Addictive drugs do not quickly corrupt
    • Addictions can be overcome voluntarily
slide14

Psychoactive Drugs

    • Depressants – drugs that calm neural activity and slow body functions
      • Alcohol, barbiturates, opiates
    • Stimulants – temporarily excite neural activity and arouse body functions
      • Caffeine, meth, nicotine, cocaine, ecstasy
slide15

Hallucinogens – distort perceptions and evoke sensory images in the absence of sensory input

    • LSD, Ecstasy, marijuana
slide16

Influences on Drug Use

    • Biological predisposition
    • Psychological factors
      • Feeling that life is meaningless
      • Significant stress or depression
    • Social influences
      • Barron environment – nothing else to do
      • Access to plentiful, cheap drug supply
    • Access to money