Endogenous Pacemakers and Exogenous Zeitgebers

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  • Created by: Liss.
  • Created on: 08-05-14 09:12
Morgan et al.
Bred 'mutant' hamsters with circadian rhythms of 20 hours - placed the SCN into 'normal' hamsters and their circadian rhythms altered to 20 hours
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Folkard
Woman who spent time in a cave - found that her oscillators desynchronised as her temperature cycle was 24 hours but her sleep was 30
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Decoursey et al.
Functionally removed the SCN in chipmunks - returned to their natural habitat among normal controls and surgical controls. After 80 days, significantly more SCN chipmunks had been killed by weasels - didn't go to sleep and so were killed
3 of 6
Boivin et al.
Found that dim lighting can alter rhythms (artificial light)
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Czeilser
Dim lighting can alter rhythms up to 22 hours and down to 28 hours
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Chicurel
FASPS - 7pm and 2am
6 of 6

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Woman who spent time in a cave - found that her oscillators desynchronised as her temperature cycle was 24 hours but her sleep was 30

Back

Folkard

Card 3

Front

Functionally removed the SCN in chipmunks - returned to their natural habitat among normal controls and surgical controls. After 80 days, significantly more SCN chipmunks had been killed by weasels - didn't go to sleep and so were killed

Back

Preview of the back of card 3

Card 4

Front

Found that dim lighting can alter rhythms (artificial light)

Back

Preview of the back of card 4

Card 5

Front

Dim lighting can alter rhythms up to 22 hours and down to 28 hours

Back

Preview of the back of card 5
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