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8 Cards in this Set

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What is the aim of forced desynchrony studies?
To look at the ability to fall asleep over the whole 24hr CBT rhythm.
How did they do the forced desynchrony studies?
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
What is an ultradian study?
Where forced desynchrony is sped up into shorter and more rapid cycle.
Give an example of a forced desynchrony ultradian study
Weitzmans 3 hr day
Carskadon and Dements 90min day
Lushington and Lacks 30min day
What was Weitzman's 3hr day?
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.
What was Carskadon & Dement's 90min day?
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.
What was Lushington and lack's 30 minute day?
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.
From the desynchronised studies, is the pm sleepy period endogynous?
Yes. It has its own 12hr circadian rhythm in its own right.