Sleep physiology and parasomnias Flashcards Preview

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Flashcards in Sleep physiology and parasomnias Deck (25):
1

what is sleep

normal recurring reversible state
not conscious or unconscious

2

at the start of sleep which is first, REM or non-REM

non-REM

3

what is brain activity like in
non-REM
REM

non-REM - synchronised and rhythmic
REM - similar to wakelfulness

4

what is muscle tone like in
non-REM
REM

non-REM - partially relaxed
REM - atonic except for resp and eye muscles

5

what is cerebral blood flow like in
non-REM
REM

non-REM - decreased CBF
REM - increased CBF

6

what are HR, BP and TV like in
non-REM
REM

non-REM decreased
REM - increased

7

are dreams narrative or non-narrative in
non-REM
REM

non-REM - non-narrative
REM - narrative

8

REM sleep is more important in adults/children

children for brain development

9

what are the 3 processes for sleep onset

homeostatic response
emotional response
circadian rhythm (25 hours)

10

what times of the day do we most need sleep

4am
2pm

11

what is non-REM sleep also known as

deep sleep

12

consequences of chronic sleep deprivation

irritability
lapse in concentration
impairs alertness, risk assessment, communication and innovation

13

chronic sleep deprivation impairs old, well rehearsed routine behaviour, true or false

false

14

what is a major cause for RTAs and death

chronic sleep deprivation

15

how many hours of sleep should you get a night

7-7.5 hours

16

what are parasomnias

sleep disorders

17

when are non-REM parasomnias

early night

18

when are REM parasomnias

late night

19

features of non-REM parasomnias

sleep walking
confusional arousals
non dreaming
sleep terrors
sleep paralysis
bruxism
restless legs
PLMS
complex behaviours

20

features of REM parasomnias

dreaming
atonia with dream interaction
PARKINSONS association
simpler behaviour

21

what is narcolepsy

rare long term brain condition that causes a person to fall asleep suddenly at inappropriate times

22

what are the clinical presentations of narcolepsy (5)

excessive daytime sleepiness
cataplexy
hypnagogic hallucinations
sleep paralysis
REM sleep behavioural disorder RBD

23

investigations for narcolepsy

overnight polysomnography
multiple sleep latency test
LP

24

LP findings in narcolepsy

low hypocretin levels in CSF

25

when narcoleptics fall asleep they go straight into non-REM sleep, true or false

false, they go straight into REM sleep