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Stages of Sleep and Sleep Deprivation

Stages of Sleep and Sleep Deprivation. Mrs. Cavell Psychology Learning Target : Analyze how sleep deprivation affects behavior. Circadian Rhythms. Any rhythmic change that occurs approximately once in a 24-hour cycle body temperature sleep and wakefulness

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Stages of Sleep and Sleep Deprivation

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  1. Stages of Sleep and Sleep Deprivation Mrs. Cavell Psychology Learning Target: Analyze how sleep deprivation affects behavior.

  2. Circadian Rhythms • Any rhythmic change that occurs approximately once in a 24-hour cycle • body temperature • sleep and wakefulness • Many of your processes like blood pressure, hormones, pain sensitivity along with sleep and wake cycles vary over the day

  3. Sleep Deprivation Effects • Hurts performance on simple, boring tasks more than challenging ones • Decreases efficiency of immune system functioning • Raises the levels of stress hormone cortisol which is linked to damage of the brain cells responsible for learning & memory • Safety and accident issues • Contributes to hypertension, impaired concentration, irritability, premature aging, etc. • After one night of sleep deprivation, people have episodes of sleep lasting a few seconds called microsleeps

  4. What is longest amount of time you have gone without sleep? • 24 hours • 36 hours • 48 hours • 48 hours+

  5. Why We Sleep Most people need 8-8.5 hours of sleep to function Most Americans sleep 7-7.5 hours. * Almost 1/3 of Americans get less than 6 hours. * 74% women sleep less than 8 hours a night. Most teens need 9 hours and 30 minutes of sleep a night. Average teenager's biological clock doesn't prepare them to awaken until 8 or 9 AM. Students with most sleep did better on grades and exams. Repair Theory: Activities during the day deplete our energy resources and sleep helps to replenish that energy.

  6. Sleep Stages, REM, and Dreaming:The Stages of Sleep

  7. Pre-Sleep • As you lay down and close your eyes, your brain's electrical activity slowly lessens • You may have some sensory awareness but your thought are loosely organized • During drowsy, presleep stage you may experience vivid sensory phenomena called hypnagogic hallucinations. • Most common hallucination is that of falling which can produce a myoclonic jerk or sleep starts – involuntary muscle spasm of the whole body that jolts the person completely awake.

  8. A brief Period of time in which it is easy to wake the person, who will insist they are not asleep. Familiar sounds fade away but you can regain alertness quickly if something interrupts you. Stage 1 Sleep

  9. A Myoclonic Jerk is the experience of…? • The feeling of drowning • The sensation of flying • The sensation of falling • A person who is REALLY annoying

  10. Stage 2 Sleep • Brain activity slows considerably and breathing becomes rhythmic. • Slight muscle twitches occur. • What we consider “sleep”

  11. Stages 3 and 4 Sleep“Slow Wave Sleep” • First time through stage 4 is about 30 minutes and is where one gets rejuvenated • During the first stage 4 of sleep, heart rate, blood pressure and breathing drop to their lowest levels and it is very hard to wake up. • Sleepwalking occurs here. • People can "wake up" during stage 4 and do a simple task and not remember it.

  12. Have you ever had a sleepwalking/talking experience? • Yes, on many occasions! • Not sure! • Definitely NOT!

  13. REM Sleep • Stages 1 - 4 considered N-REM (non-REM sleep) • Rapid eye movement (REM Sleep) as eyes move quickly back and forth • Most dreaming occurs in REM sleep but muscle activity is suppressed to keep you from acting them out. (Sleep Paralysis)

  14. KLS? • Klein-Levin Syndrome aka “Sleeping Beauty Syndrome” • Episode first appears between 10-20 years old • Sufferers may sleep 18hours+ per day with brief periods of wakefulness • Mood is noticeably altered: Childish, spacey, vulgar, and odd food cravings • Episodes can last 2 to 80 days • The episodes come and go without warning

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