Biological Rhythms (Infradian and Ultradian Rhythms) Flashcards

1
Q

what is an infradian rhythm?

A

a type of bio rhythm which has a frequency of less than one cycle in 24 hours e.g. menstruation or SAD

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is the female menstruation cycle governed by?

A

monthly changes in hormone levels which regulate ovulation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what does the menstrual cycle refer to?

A

time between first day of period, when womb lining sheds to the day before her next period

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

how long does a typical cycle last?

A

28 days but 24-35 is considered normal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

the rising level of what hormone causes the ovary to develop an egg and release it?

A

oestrogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what hormone is present after ovulation? (when egg gets released)

A

progesterone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what does the hormone progesterone do?

A

helps the womb lining grow thicker, readying the body for pregnancy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what happens if pregnancy doesn’t occur?

A

egg is absorbed into the body, the womb lining comes away and leaves the body (the menstrual flow)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

who conducted research to show menstrual cycle can be influenced by exogenous factors?

A

Stern and McClintock

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what did Stern and McClintock demonstrate?

A

how menstrual cycles synchronise as result of inf of female pheromones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

who were McClintock’s sample?

A

29 women with irregular periods

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what did McClintock do?

A

get samples of pheromones from 9 women at diff stages of mens w/ cotton pas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

how long were pads worn on armpits?

A

8 hrs to make sure pheromones picked up

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what happened to cotton pads after collection?

A

treated with alcohol, frozen and rubbedon upper lip of other ppts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what happened on day 1 and day 2 and so on in Stern and McClintock’s exp?

A

day 1 - pads from start of mens applied to 20 ppts

day 2 - all ppts given pad and so on

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what were the findings of Stern and McClintock’s exp?

A

68% of ppts exp changes to cycle, bringing them closer to cycle of odour donor

17
Q

what is SAD?

A

seasonal affective disorder, diagnosed as mental disorder in DSM-5

18
Q

why is SAD an infradian rhythm?

A

symptoms such as low mood and interest triggered by winter months when number of daylight hrs are shorter