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Sleep Theories and Effects of Sleep Deprivation

Explore the different theories of sleep and the effects of sleep deprivation, including tiredness, lack of energy, and impaired immune function. Learn about restoration and survival theories of sleep and why sleep is essential for overall well-being.

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Sleep Theories and Effects of Sleep Deprivation

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  1. SLEEP THEORIES

  2. SLEEP DEPRIVATION PARTIAL SLEEP DEPRIVATION – less sleep than normal Effects – tiredness, lack of energy, lapses in attention TOTAL SLEEP DEPRIVATION - No sleep at all Effects – anxiety disorders, hallucinations, paranoia. Prolonged sleep deprivation can lead to impaired functioning of the immune system (Coren) GOING WITHOUT SLEEP

  3. SLEEP DEPRIVATIONTOTAL SLEEP DEPRIVATION RESULTS IN: It is difficult to judge if a person has total sleep deprivation due to microsleeps This is a very short period of drowsiness or sleeping that occurs when the person is apparently awake

  4. THE PURPOSE OF SLEEP There are many different theories about why we sleep. These theories include: RESTORATION & SURVIVAL

  5. THE PURPOSE OF SLEEPRESTORATION RESTORATIVE THEORIES OF SLEEP (Recovery theories/Restore & Recovery Theories) These theories propose that sleep provides ‘time out’ to help us recover from depleting activities during waking time that use up the body’s physical and mental resources NREM REM SLEEP SLEEP

  6. THE PURPOSE OF SLEEPRESTORATION –NREM SLEEP REM REBOUND People in sleep laboratories were regularly woken when they began REM sleep. Researchers found that when they were allowed to sleep again, they spent longer in REM sleep than they normally would.

  7. THE PURPOSE OF SLEEPSURVIVAL SURVIVAL THEORIES OF SLEEP (Meddis) (Adaptive Theories/Evolutionary Theories/Preservation & Protection Theories) These theories propose that sleep evolved to enhance survival by protecting an organism through making it inactive during the part of the day when it is most risky and dangerous to move about (Meddis, 1977) EVIDENCE: Animals with few natural predators sleep for longer periods of time Animals with many natural predators sleep for shorter periods of time We sleep at night because we need light to see

  8. EVALUATION Survival theories do not explain why sleep involves a loss of awareness, since the loss of consciousness during sleep may place the organism at greater risk. Limited evidence for the survival theories – but they do provide insights. Overall – sleep has multiple purposes – two of which are restoration & survival.

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