Sleep_EO Flashcards
What’s to know about NREM?
75% of night
Slowed autonomic system (low BP, low T, low HR)
When Beta waves?
Awake
When alpha waves?
Drowsy but awake with eyes closed
When theta waves?
N1 507hz 5% of the night Hall hypnagogiques «Rolling eyes»
When k complexes and spindles?
N2 45% of night Also theta waves 12-14hz No eye mvt
When slow wave sleep?
N3
12-13% of night (most of it during first 1/3 of night)
0.5-4Hz
Delta waves
What’s to know about REM sleep?
25% of the night
Autonomic activity increased (BP, HR, T)
Fast, low voltage with sawtooth waves
Theta and beta
Penile erection
Paralysis
Dreams are abstract and weird (vs NREM dreams are lucid)
Majority of rem happens in the last third of the night
Q90 mins ; first REM is short (10min) and increases during the night ad 45min
No REM during naps
Elderly and changes in sleep
1- need stays the same
2- total sleep same
3- more fractionnated sleep
4- reduced N3 (SWS) but increased N1 and N2
5- sleep latency increased
6- reduced tot REM sleep (more frequent but shorter)
7-advances circadian cycle
what’s the purpose of the suprachiasmatic nucleus in sleep?
Circadien rythm
Site of action of melatonie
Which neurotransmitters are pro-REM and anti-REM?
Pre: Ach
Anti: NE and 5HT
Which neurotransmitters favor sleep and favor awake?
Sleep: Ach
Awake: NE, orexin (hypocretin), hist, dopamine, glutamate
Anatomic site of REM?
Reticular formation
Pons
What is the tx of narcolepsy?
Planned naps during the day
Modafinil for sleep attacks
SSRI/SNRI/TCA for sleep paralysis, cataplexie and hall
Sodium oxybate for all above
What can happen clinically in narcolepsy (4)?
1-sleep attacks (2-6 times per day)
2- cataplexie: sudden loss of tonus, preserved sensorium, precipitated by strong emotions
3-hypnopomp/hypnagog hall : REM sleep starts when almost awake, usually visual and vivid
4-sleep paralysis
DSM criteria for narcolepsy?
A. Sleep attacks at least 3x per week for at least 3 months
B. One of the following:
1-cataplexie several times per months
2-hypocretine deficiency in LCR
3-PSMG, REM latency < 15min OR sleep latency <8 min with >2 sleep-onset REM au MSLT (multiple sleep latency test)