Infradrian And Ultraradian Rthyms

Question 1

How long do they last

Answer 1

Greater than 24 hours

Question 2

Menstrual cycle:

Answer 2

Monthly changes in hormone levels
28 days to complete cycle
Ovulation

Question 3

Case study stern and McClintock

Answer 3

Demonstrated how menstrual cycles synchronise to show how pheromones effect the cycle
29 females with irregular periods not on pill
Sweat collected from armpit then placed on upper lip of other participants
68% of women experienced changes In cycle which bought them closer to cycle of the odur doner

Question 4

What is SAD

Answer 4

Seasonal affective disorder- seasonal pattern of low mood and lack of interest in life where daylight is short
Can be classed as circanual rhythm as it’s longer or circadian due to sleep wake pattern disrupting
Can be affected by melatonin levels

Question 5

What are stages of sleep

Answer 5

Sleep is an ultraradian rhythm lasts 24 hours with 5 stages which are monitored by level of brainwave activity

Question 6

Stage 1

Answer 6

Slight sleep
Easily woken
Muscle twitching,slows
Brain wave patterns slowed
Alpha waves

Question 7

Stage 2

Answer 7

Breathing and heart rate slows
Decrease in body temp
Brainwaves slower

Question 8

Stage 3

Answer 8

Slow waves
Brain begins to generate slow delta waves

Question 9

Stage 4

Answer 9

Very deep sleep
Difficult to wake
Rhythmic breathing
Limited muscle activity
Delta waves

Question 10

Stage 5

Answer 10

REM- rapid eye movement
Dreaming occurs
Muscles relax
Heart rate increases breathing rapid
Brain activity speeds

Question 11

Basic rest activity (BRAC)

Answer 11

Period of alertness followed by fatigue
Occurs across 90 min cycle
Ultraradian rhythm