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13 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Circadian rhythms |
Zucker made a Danish fridge |
Zucker made a Danish fridge |
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Biological rhythm |
A cyclical change in the way In biological system behaves |
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Circadian rhythm |
Cycles that occur once every 24 hours |
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SCN |
The main internal biological clock which helps regulate Circadian patterns, is linked to the pineal gland which releases melatonin, it's connected to the retina therefore when light falls melatonin is secreted |
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Zucker et al |
Removed the SCN of rats and found that sleep and hunger was disrupted |
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The sleep wake cycle |
Controlled by endogenous and exogenous pacemakers |
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Michael siffre |
Spent six months in a cave with no external cues his circadian rhythms generally lasted between 24 and 48 hours, suggesting that internal clocks determine our circadian rhythms |
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Ashcoff and Weaver |
Asked participants who are volunteers to sleep in World War II bunkers, found the circadian rhythms generally lasted 24 to 25 hours |
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Duffy et al |
Stated that there are individual differences between circadian rhythms, early birds and night owls |
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Temperature changes |
Peaks at 6pm and is lowest at 4:30 am |
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Folkard et al |
Read stories to 12 and 13-year-olds at 9 AM when core body temperature is low or 3 PM when core body temperature is high, found that those on the 3 PM group remembered more of the story a week later and had better understanding |
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Use with drugs |
Research helps determine when drugs will be most effective they are likely to be more effective when hormones are high e.g. aspirin is more affective treating heart attacks late at night |
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Hormonal changes |
Hormones also differ from the day cortisol peaks at 6 AM and is lowest at 12 PM |
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