Infradian Rhythm^

Question 1

Frequency?

Answer 1

frequency of less than one cycle in 24h
- menstrual cycle
- seasonal affective disorder

Question 2

The Menstrual Cycle

Answer 2

monthly - 28 day cycle (24-35)
rising levels of oestrogen
ovaries to develop an egg
release it (ovulation)
kkkprogesterone thickens the lining of the womb reading it for pregnancy
no pregnancy, egg is absorbed

Question 3

Synchronising The M Cycle

Answer 3

endogenous system influenced by exogenous factors
Stern & McClintock
- cycle may sync because of the influence of phenoromes
-29 with irregular cycles
- pheromones samples taken from 9 with cotton pad in armpit for 8h
- pad treated with alcohol and frozen to be rubbed on the upper lip
68% had changes to cycle
- sync with odour doner

Question 4

Seasonal Affective Disorder

Answer 4

circannul rhythm (type of inradian)
- yearly
melatonin secreted for a while due to lack of light. created depressive symptoms

Question 5

Practical Application

Answer 5

Phototherapy
sit in front of lamp for 30 mins
get as much light as possible
most effective/ recommended

Question 6

Evolutionary Basis

Answer 6

before, good for women to menstruate at the same time
pregnant/ have baby together
child lose mother, they can be breastfeeded from the other one
- increase chance of survival

Question 7

Methodological Limitations

Answer 7

failed to replicate finding
decrease reliability
due to confounding variables
- diet, stress, exercise, puberty, medical condition/medications
if accounted for during study
- they are extrogenous