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Theories of sleep

Theories of sleep. Restoration (Oswald; Horne) The function of sleep is to allow body to be repaired and restored Oswald (1980) – REM for brain; SWS for body Horne (1988) – core sleep (REM & SWS) vs. optional sleep – sleep deprivation leads to recovery

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Theories of sleep

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  1. Theories of sleep • Restoration (Oswald; Horne) • The function of sleep is to allow body to be repaired and restored • Oswald (1980) – REM for brain; SWS for body • Horne (1988) – core sleep (REM & SWS) vs. optional sleep – sleep deprivation leads to recovery • https://simplypsych.wordpress.com/2014/02/14/outline-and-evaluate-restoration-explanations-of-the-functions-of-sleep-416-marks/ psychlotron.org.uk

  2. Restoration theory • Main predictions: • Deficits in functioning during sleep deprivation • Rebound following deprivation • Increase in REM during brain growth, reorganisation & repair • Increase in SWS during illness, recovery from injury psychlotron.org.uk

  3. CORE SLEEP • Concentrated in stage 4 slow wave sleep (SWS) and in REM • SWS – lighter sleep – Oswald believes SWS restores body to full waking capacity. Horne does not believe this – he believes this occurs during periods of relaxed wakefulness.

  4. Effects of sleep deprivation • Animal studies tend to support restoration • Prolonged sleep deprivation causes immune failure & death • Studies of humans produce less clear-cut results • Confounding effects of stress etc. psychlotron.org.uk

  5. Rebound • Generally, people catch up on sleep following deprivation • Not all lost sleep is reclaimed • About 70% of lost SWS and about 50% of lost REM typically recovered • Only some sleep is necessary psychlotron.org.uk

  6. Illness & injury • Sleep does increase during illness and recovery from injury • Total sleep time increases during illness • REM increases during recovery from brain injury, ECT & drug withdrawal • SWS deprivation can cause physical symptoms psychlotron.org.uk

  7. Evaluation • Much evidence is consistent with the restoration view • Main problem comes from apparent lack of serious biological malfunction during sleep deprivation in humans. • https://simplypsych.wordpress.com/2014/02/14/outline-and-evaluate-restoration-explanations-of-the-functions-of-sleep-416-marks/ psychlotron.org.uk

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