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biopsychology
biological rhythms
infradian rhythms
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Created by
ruby mason-hughes
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Cards (18)
What are infradian rhythms?
Rhythms lasting longer than a
day
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How often does the menstrual cycle occur?
Roughly every
28
days
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What hormones control the menstrual cycle?
Oestrogen
and
progesterone
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What happens to the womb lining if there is no pregnancy?
The womb lining
sheds
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What is seasonal affective disorder (SAD)?
A type of
depressive
disorder
that is
seasonal
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What triggers low mood in SAD sufferers?
Reduced hours of
daylight
in winter
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How does lack of light affect melatonin levels in SAD?
It causes
increased
melatonin levels
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What is a real-world application of understanding SAD?
Development of
phototherapy
Use of light boxes to reset
melatonin
levels
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How do light boxes help SAD sufferers?
They relieve symptoms by resetting
melatonin
levels
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What does the use of light boxes suggest about light's role in infradian rhythms?
It supports the role of light in
regulating
rhythms
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What did German's research find about SAD prevalence?
More common in
Northern
US states
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What percentage of people in New Hampshire are affected by SAD?
Around
10%
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What percentage of people in Southern Florida are affected by SAD?
About
2%
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What does reduced exposure to sunlight in winter lead to?
Increased
melatonin
production
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How does increased melatonin production affect the sleep-wake cycle?
It
disrupts
the sleep-wake cycle
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What external factors can alter the menstrual cycle?
Exposure to other women’s
pheromones
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What did Stern & McClintock's research suggest about menstrual cycles?
Women can
synchronize
their
periods
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What is important to consider regarding infradian rhythms?
Both
biological
and environmental influences
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