Thursday, May 22, 2014

Unit 6 Notes

States of Consciousness


  • Sleep
  • Hypnosis
  • Drugs

Sleep

  • A state of consciousness
  • We are less aware of our surroundings
  • Why do we daydream?
  • The can help us prepare for future events
  • THey can nourish our social development
  • Can substitue for impulsive behavior





Fantasy Prone Personality
  • Someone who imagines and recalls experiences with lifelike vividness and who spends considerable time fantasizing
Biological Rhythms

Annual Cycle : Seasonal variation
  • 28 day cycles : menstrual cycle
  • 24 hour cycle : Our circadian rhythm
  • 90 minute cycle : sleep cycles
Circadian Rhythm
  • Our 24 hour biological clock
  • Our body temp and awareness changes throughout the day
Sleep Stages
  • 5 identified stages of sleep 
  • Takes 90-100 minutes to pass through all 5 stages
  • The brains waves will change according to the sleep stage you are in
  • The first four stages are known as NREM
  • the 5th is called REM sleep
Stage 1
  • Kind of awake, kind of asleep
  • Only lasts a few minutes, and you usually only experience it once a night
  • Eyes begin to roll slightly
  • Your brain produces theta waves ( high amplitude, low frequency (slow))
Stage 2 
  • This stage is part of the 90 minute cycle and occupies approximately 45-60& of sleep
  • More Theta waves that get progressively slower
  • Begin to show sleep spindles ( short bursts of rapid brain waves)
Stages 3 and 4
  • Slow wave sleep
  • you produce Delta waves
  • If awaken you will be very groggy
  • Vital for restoring body's growth hormones and good overall health
  • May last 15-30 minutes
  • It is called "slow wave" sleep because brain activity slows down dramatically from the "theta" rhythm of stage 2 to a much slower rhythm called "delta" and the height or amplitude of the waves increases dramatically
REM sleep (Stage 5)
  • Rapid eye-movement
  • Brain is very active

Sleeping Disorders

Insomnia

  • Persistent problems falling asleep
  • Affects 10% of the population 
Narcolepsy
  • Suffers from sleeplessness and may fall asleep at unpredictable or inappropriate times
  • Directly into REM sleep
  • Less than .001% of population
Sleep Apnea
  • A person stops breathing during their sleep
  • Wake up momentarily, gasps for air, then falls back to sleep
  • Very common especially in heavy males
Night Terrors
  • A sleep disorder characterized by high arousal and an appearance of being terrified
  • Occurs in stage A, not REM, and are not often remembered
Sleepwalking
  • sleepwalking is a sleep disorder affecting an estimated 10% of all humans at least once in their lives
  • sleepwalking most often occurs during deep non-REM sleep (stages 3 or 4) early in the night


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