sleep Flashcards
what type of sleep is also called slow wave sleep
non rem sleep
what happens to HR, BP, cerebral blood flow and total volume in non-rem sleep
they all decrease
what happens to cerebral blood flow in REM sleep
increases
describe the difference in dreams in REM and Non- REM sleep
non-REM - non narrative dreams
REM - narrative dreams
when does circadian rhythm peak in normal people
4am and 2pm
what is the length of a normal circadian rhythm
25 hours
does lack of sleep affect muscle recovery
no
how much sleep is needed
7-7.5 hours
a nap of 15 minutes during the day is equivalent to how much sleep
90 mins overnight
what proportion of the night is taken up bu non-REM sleep
3/4s
describe a REM parasomnia
acting out dream in last third of the night eg PD
describe a non- REM parasomnia
1st 2/3rds of night- complex behaviours where they seem awake
what are hypnagogic hallucinations
hallucinations occurring at onset of sleep
what is cataplexy- what % of narcoleptics have it
loss of muscle tone when emotional- 70%
investigations for narcolepsy
overnight polysomnography and multiple sleep latency test done the next day
