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SLEEP 3320 > WHAT'S SLEEP, MEASURING IT > Flashcards

WHAT'S SLEEP, MEASURING IT Flashcards

1
Q

what are some of the biological processes associated with sleep?

A

growth-hormones surge in sleep
flushing metabolic waste out of brain
brain plasticity for memories+learning
repair of daily injury/wear +tear

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2
Q

To conserve energy, all animals need the same amount of sleep T/F

A

FALSE - sleep duration is proportional to amount of activity/physiological demand

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3
Q

______sleep is for restoration and repair whereas ______ is used for memories + learning

A

NREM - in passive sleep,

REM - brain active state, actively creating stuff

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4
Q

TST _______each year

A

DECREASES

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5
Q

Rajaratnam et al., (2004) deprived pp’s of sleep, then allowed them to stay in bed upto 14 hours. What happened next?

A

Restored back to 8.7h of sleep

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6
Q

Adults are recommended to sleep no less than_____hours for optimal function, but more than______ may indicate a problem

A

7;9

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7
Q

The recommended TST for young adults, illness affected, sleep debt recoverers is______

A

9+ hours

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8
Q

A good measure of sleep adequacy is______

A

QUALITY of wake time

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9
Q

What are the 6 parameters PSG measure?

A

1) Sleep latency;
2) TST
3) sleep efficiency
4) awakenings
5) wake after sleep onset (WASO) = how LONG you were awake for
6) sleep stages

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10
Q

Actigraphy directly measures sleep

T/F

A

FALSE - looks at indirect measures i.e. movement, HR, light exposure

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11
Q

Subjective measures of sleep show________

A

sleep latency, total sleep time, sleep efficiency, awakenings, sleep quality, daytime sleep

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12
Q

Subjective and objective sleep measures have the same measures and outcomes
T/F

A

Measures ARE the same –> can tell you the same stuff, but OUTCOMES are different, may have normal PSG but report idiopathic insomnia

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13
Q

What do the following self-report questionnaires measure?
Pittsburgh sleep quality index (PSQI)
Epworth sleepiness scale (ESS)
Karolinska sleepiness scale (KSS)

A

PSQI - sleep quality, 19 items measured 0-3 where HIGHER scores = worse sleep. >5 = poor sleep
ESS - trait sleepiness/ day time sleepiness, how likely are you to fall asleep in ____situation, HIGHER SCORES = worse sleepiness, used for diagnosing narcolepsy
KSS - state sleepiness - reaction time

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14
Q

STOPBANG is used when __________

A

Screening for risk of obstructive sleep apnoea

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15
Q

Sleep stages are categorised into 2 cstates_________

A

REM / NREM

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16
Q

What is meant by REM being desynchronised and paradoxical?

A

The EEG oscillations irregular, sum of neurons firing comes from many different rates = bumpy, much like wake states
Paradoxical bc mind is active but body catatonic

17
Q

How do we mark the onset of NREM?

A

EOG shows it first having slow rolling eye movements

18
Q

EEG measures electrical activity by_________

A

Measuring the DIFFERENCE in electrical conductivity between two electrodes = is a summary of electrical activity in that area
signal is amplified + filtered to produce digital recording

19
Q

EEG Hertz measure_______

A

number of cycles per second

20
Q

During NREM localised neurons typically have the same output
T/F

A

True

21
Q

Sleep onset is related to_____waves of ____Hz

A

Theta, 4-7Hz

22
Q

The marker of entering NREM2 is_________

A

K complx + sleep spindles

23
Q

Theta activity is only associated with NREM3

T/F

A

False - can be seen even in NREM1

24
Q

A sleep spindle is classified when________

A

1-16 Hz > 0.5 sec that waxes and wanes

25
Q

NREM3 is classified when________ of sleep is SWS

A

20-50%

26
Q

SWS is seen on EEG when waves are___________

A

Delta - <2Hz

27
Q

REM sleep involves constant EOG movement

T/F

A

FALSE - comes in bursts

28
Q

Why do we see EMG twitches in REM if body is meant to be catatonic?

A

Is a protective mechanism so we don’t act out the dreams

29
Q

Each night we usually go through______ sleep cycles lasting_______

A

3-4; 90mins

30
Q

You will feel the worst being woken up from which sleep stage?

A

2 –>

31
Q

The DEEPEST sleep occurs in _______time of night

A

First third

32
Q

Normal sleep efficiency = ___%

A

85%

33
Q

Normal sleep latency for YA _______

A

10-30mins

34
Q

Compared to YA sleep, children get MORE______

A

SWS

35
Q

Elderly get the ________SWS

A

Least

36
Q

Circadian system signal for wakefulness peaks when_______

A

In evening before sleep

37
Q

Circadian system signal for sleep peaks when_______

A

Early in the night to PROLONG sleep, after homeostatic sleep debt is paid off

SLEEP 3320 (8 decks)

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