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Psychology
Biopsychology
Infradian Rhythms
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Created by
india day
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Cards (21)
What is an Infradian rhythm?
A
biological
rhythm lasting longer than
24 hours
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How is the menstrual cycle regulated?
By monthly changes in
hormone levels
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What does the menstrual cycle refer to?
The time from the
first
day of a
period
to the
next
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How long does a typical menstrual cycle take?
Approximately
28 days
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What hormone increases during the menstrual cycle to cause ovulation?
Oestrogen
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What role does progesterone play after ovulation?
It helps the
womb lining
grow thicker
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What happens if pregnancy does not occur after ovulation?
The
egg
is absorbed and the womb lining sheds
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What is the term for external cues that may influence biological rhythms?
Exogenous zeitgebers
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What did the study by Stern and McClintock (1998) investigate?
How
menstrual cycles
may sync due to
pheromones
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How were pheromones collected in the Stern and McClintock study?
Using cotton pads placed in
armpits
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What percentage of women experienced changes to their cycle in the study?
68%
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What does the conclusion of the Stern and McClintock study suggest?
Women living close may synchronize
cycles
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What is a chemical substance that affects behavior or physiology called?
Pheromones
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What is Seasonal Affective Disorder (SAD)?
A
depressive
disorder with a
seasonal
pattern
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What triggers the symptoms of SAD?
Shorter
daylight hours
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What type of infradian rhythm is SAD classified as?
A
circannual
rhythm
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What hormone is thought to be implicated in SAD?
Melatonin
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How does melatonin secretion change in winter?
It
continues
for
longer
due to
less
light
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What effect does prolonged melatonin secretion have on serotonin?
It affects serotonin production linked to
depression
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What are the evaluations regarding menstrual cycle synchronization?
Evolutionary
advantage for childcare sharing
Jeffery Schank
(
2004
) questions validity
Competition may lower
offspring fitness
McClintock's
research has confounding variables
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What are some confounding variables that could alter a woman's cycle?
Stress,
diet
, and
exercise
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