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8 Cards in this Set
- Front
- Back
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What is the aim of forced desynchrony studies?
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To look at the ability to fall asleep over the whole 24hr CBT rhythm.
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How did they do the forced desynchrony studies?
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by forcing people to go to sleep at all sorts of weird hours and then measuring sleep onset latency. Idea is to desynchronise the body temp from the sleep/wake cycle
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What is an ultradian study?
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Where forced desynchrony is sped up into shorter and more rapid cycle.
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Give an example of a forced desynchrony ultradian study
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Weitzmans 3 hr day
Carskadon and Dements 90min day Lushington and Lacks 30min day |
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What was Weitzman's 3hr day?
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2hrs awake and 1 hr asleep across 24hrs, so 8 3 hr days. Found that the least SOL occurred around the Tmin regardless of how long the people had been awake for.
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What was Carskadon & Dement's 90min day?
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60mins awake, 30min asleep over 24hrs over 4 or 5 days. Lots of data. Tried to identify the secondary sleepy zones, but was not fine grained enough.
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What was Lushington and lack's 30 minute day?
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20min awake, 10 min asleep acoss 24 hrs. Used concept of ''sleep gate'. identified it as a time 4-5hs after Tmax. Average sleepgate was 11.30pm.
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From the desynchronised studies, is the pm sleepy period endogynous?
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Yes. It has its own 12hr circadian rhythm in its own right.
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