Sleep

Question 1

What is core sleep?

Answer 1

First 5 hours
Most deep sleep (stages 3 and 4)
Half of Rapid Eye Movement (REM) sleep

Question 2

When is optional sleep?

Answer 2

Next 2+ hours

Mostly stage 1&2

Question 3

What did the Bunker study show?

Answer 3

that circadian rhythm (a roughly 24 hour cycle in the physiological processes of living beings) shifted to 25 hours

Question 4

How does development affect sleep?

Answer 4

• reduction in total sleep time
• early reduction in %REM
• later reduction in stages 3&4: most lost by age 40

Question 5

What is the mean sleep duration?

Answer 5

7.75 hours

Question 6

Give 4 ways in which we can investigate sleep?

Answer 6

• subjective sleep quality
• movement during sleep
• EEG output
• dream content

Question 7

Give features of REM dreams?

Answer 7

2x more likely
6x longer
more vivid
(even though dreams are not exclusive to REM)

Question 8

What are the features of insomnia?

Answer 8

delayed sleep onset, disturbed sleep, early morning waking

Question 9

Causes of insomnia?

Answer 9

psychological problems (depression, anxiety)
other medical disorders e.g pain
social environment (alcohol, drugs)

Question 10

What is narcolepsy?

Answer 10

• occurs in 0.02-0.05% of population
• difficult to diagnose
• impaired quality of life

Question 11

What are the features of narcolepsy?

Answer 11

1. Sleep attacks - overwhelming sleepiness
2. Cataplexy (paralysis of voluntary muscles)
3. Vivid sleep-onset dreams/ hallucinations

Question 12

What is sleep paralysis?

Answer 12

• conscious, eyes open, unable to move: hallucinations
• on going to sleep or on waking
• REM sleep intrustion
• 20-60% of people experience once in their life

Question 13

How many nights sleep loss is there reserve capacity for?

Answer 13

1 night