Hypothalamus- SCN- unbuilt 24hr firing pattern- sensitive to light
2 of 7
Circadian Rhythms: SCN & Melatonin?
Scn regulates melatonin in Pineal gland- induce sleep hormone- produce in dark= sleep, inhibit in light= awake
3 of 7
Circadian Rhythms: Exogenous Zeitgeiber
Ez in the sleep wake cycle= light resets body clock each morning
4 of 7
Circadian Evaluation: Campbell? + - ?
Light behind knee- C/R altered + light as EZ
5 of 7
Circadian Evaluation: Shiffre? + -?
In cave for months- isolated from environmental stimuli- S/W cycle 241/2 hours.m + EP's alone can regulate cycle though altered slightly - one off case study cant generalise
6 of 7
Circadian Rhythms: Morgan? +-?
Mutant hamsters, abnormal rhythms of 20hrs, transplanted abnornmal SCN's to normal hamsters- their rhythms became abnormal too. + supports SCN as EP - hamsters cant extrapolate S= unethical animal rights
7 of 7
Other cards in this set
Card 2
Front
Hypothalamus- SCN- unbuilt 24hr firing pattern- sensitive to light
Back
Circadian Rhythms: Endogenous Pacemakers?
Card 3
Front
Scn regulates melatonin in Pineal gland- induce sleep hormone- produce in dark= sleep, inhibit in light= awake
Back
Card 4
Front
Ez in the sleep wake cycle= light resets body clock each morning
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