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Sleep deprivation

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  • 1. Lesson 6 Sleep DeprivationMonday, 23 January 2012
  • 2. Lesson 5: Characteristics & Patterns of Sleep EXAM QUESTION: Name and describe the unique brain wave features that are characteristic of stage 2 sleep. (2 marks)Monday, 23 January 2012
  • 3. Model Response: The unique brain wave features that are characteristic of stage 2 sleep are: • sleep spindles – brief bursts of higher frequency brain waves • K complexes – single sharp bursts (rise then fall) in amplitude (and lower frequency). Theta waves are not ‘unique brain wave features’ characteristic of stage 2 sleep as they also occur in stage 1 and dominate in stage 3.Monday, 23 January 2012
  • 4. Sleep Deprivation Lesson 6 Outcomes *Explain the effects of partial and total loss of sleep *Understand the importance of REM and NREM sleep *Describe the patterns of sleep recovery Monday, 23 January 2012
  • 5. Sleep DeprivationMonday, 23 January 2012
  • 6. Sleep Deprivation: Lack of sleep Total Deprivation Partial Deprivation Some sleep in 24 hours No sleep 24 hoursMonday, 23 January 2012
  • 7. Effects of sleep deprivation Total Deprivation Partial Deprivation - Sustained attention - Psychological (cognitive, affective, impaired and behavioural) - Periods of microsleep - Physiological effects (excluding heart - Hat phenonmenon rate, respiration, blood pressure and - Irritability body temperature - Confusion - Chronic sleep deprivation can lead to - Delusions / Hallucinations cardiovascular disease, mood disorders - Sleep Deprivation Psychosis and immune deficienciesMonday, 23 January 2012
  • 8. Effects of the loss of REM and NREM sleep Some say: O T TO PIC H REM deprivation - memory and learning problems and mood disturbances NREM deprivation - disturbances in growth and restoration of the body’s resources BUT NOT ALL FINDINGS SUPPORT THISMonday, 23 January 2012
  • 9. If I stay out partying all night Friday night, will sleeping in the next day make it all better?Monday, 23 January 2012
  • 10. Sleep recovery patterns Generally an extended good nights sleep is enough to recover from sleep deprivation REM Rebound HUGE extension on time spent in REM sleep Sleep DEBT Microsleeps Like any debt, Brief involuntary period of sleep during accumulates. Can easily be wakeful activity ‘paid off’ with adding a few hours to your sleep cycleMonday, 23 January 2012