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Flashcards in Higher Functions And Perception Deck (314)
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1

What is circadian rhythm

Controls our sleep / awake periods

2

What is the endogenous circadian rhythm

The 24 hour body rhythm controlled by zeitgebers

3

What are zeitgebers

External factors that control the circadian rhythm

Sunrise sunset
Meal patterns

4

What is the free running circadian rhythm

25 hour cycle

Only happens when not effected by any zeitgebers

5

What body temperature makes it difficult to sleep

High body temp

6

What is a circadian High

High body temperature usually around 6pm ish

7

What is a circadian low

Lowest body temp usually around 4/5am ish

8

What is the most important internal factor affecting circadian rhythm

Body temperature

9

How many sleep credits do we get for every hour of sleep

2 sleep credits

10

what is the maximum number of sleep credits

16 sleep credits (8 hours of sleep)

11

How many sleep credits do you lose when awake

-1 sleep credit per hour

12

What reduces your sleep credits

Waking up early / disturbed sleep

13

What happens when you run out of sleep credits

Sleep debits/ deficits

14

At what rate do you accumulate sleep debits

1 debit / hour

15

How much sleep do you need to recover from a sleep debit

2x as much sleep do recover from 1 debit

16

What are he affects of sleep debits

Fatigue
Moody
Irritable
Weak
Reduced performance/concentration
Increased errors
More prone to illusions

17

What is the biggest danger in sleep debits

You might not realise performance is degrading

18

What measures brain activity

EEG

Electroencephalogram

19

What is the first stage of sleep

Drowsiness
Light sleep

20

What is the second stage of sleep

Light sleep
Short periods of fast eeg

21

What stage do you spend 50% of your time when asleep

Stage 2

22

What are stages 3/4 in sleep

Orthodox sleep / slow wave sleep
Deep sleep

23

What is stage 5 of sleep

Rapid eye movement (R.E.M.) / paradosicle

Eyes move behind eye lids
Dream stage
EEG in R.E.M. sleep is same as awake
Muscles paralysed to stop is acting out dreams

24

What is orthodox sleep

Stage 3/4

Body and cells recovering from the day / repairing

25

What is paradoxical sleep

Stage 5

Strengthens / organises memory

26

What is the rebound effect

Body / brains ability to determine how much orthodox/ paradox sleep is needed each night

27

How long is the time between falling asleep and the first R.E.M.

90 mins

28

What does the period of R.E.M. sleep do as the night goes on

Increases

29

How many R.E.M. sleep do you get a night

5 periods

30

What is the minimum duration for a nap to be restorative

10 mins