Endogenous Pacemakers and Exogenous Zeitgebers

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

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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

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Card 2

Front

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

Back

Card 4

Front

Found that dim lighting can alter rhythms (artificial light)

Back

Card 5

Front

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

Back

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Endogenous Pacemakers and Exogenous Zeitgebers