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12 Cards in this Set
- Front
- Back
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Slow Wave Sleep |
GH is secreted during SWS and is important for protein synthesis and cell growth Sassin et al found that, when inverting participants sleep-wake cycles by 12 hrs, the release of GH was also inverted. Krueger et al. found that lack of SWS is associated with reduced immune system functionality as the immune system relies on antibodies that are regenerated during SWS |
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REM sleep |
Brain growth: percentage of REM sleep is higher in premature babies to allow for brain growth. Siegel found that baby platypus' (immature) have around 8hrs REM sleep whereas baby dolphins (mature) have almost no REM sleep Neurotransmitter: Siegel and Rogawski suggest that REM allows for a break in neurotransmitter activity to allow neurones to regain sensitivity. MAOIs (antidepressants) increase levels of monoamine group neurotransmitters and abolish REM. IN=ncrease of monoamine groups means receptors don;t need to be revitalised and REM is not needed Memory: Crick and Mitchison suggest that REM sleep allows unwanted memories to be discarded and important memories to be accessed. Stickgold suggests that REM allows for consolidation of procedural memory and SWS allows for consolidation of semantic memory |
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Restoration Evaluation |
+: Rechtstaffen et al. found that rats forced awake on a rotating disc died after 33 days of sleep deprivation -: Rattenborg et al. found that in a similar study, pigeons suffered no ill effects +: Shapiro et al. found that marathon runners slept an extra hour two nights following a race and had increases SWS. -: Non human studies are difficult to generalise from though they allow bypassing of ethical barriers -: evolutionary explanation suggests environmental pressures are responsible for dolphins lack of REM as seals have a similar sleeping pattern and, when on land, they develop REM similar to small mammals |
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Sassin et al. |
SWS AO1: found that, when inverting participants sleep-wake cycles by 12 hrs, the release of GH was also inverted. |
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Krueger et al. |
SWS AO1: found that lack of SWS is associated with reduced immune system functionality as the immune system relies on antibodies that are regenerated during SWS |
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Siegel |
REM AO1: found that baby platypus' (immature) have around 8hrs REM sleep whereas baby dolphins (mature) have almost no REM sleep |
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Siegel and Rogawski |
REM AO1: REM allows for a break in neurotransmitter acticity to allow neurones to regain sensitivity |
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Crick and Mitchison |
REM AO1: During REM sleep, unwanted memories are discarded to make more important memories accessible. |
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Stickgold |
REM AO1: suggests that REM allows for consolidation of procedural memory and SWS allows for consolidation of semantic memory |
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Rechtstaffen et al. |
AO2: found that rats forced awake on a rotating disc died after 33 days of sleep deprivation |
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Rattenborg et al. |
AO2: found that, when forced awake on a rotating disc, pigeons suffered no ill effects |
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Shapiro et al. |
AO2: found that marathon runners slept an extra hour two nights following a race and had increases SWS. |
