sleep over the lifespan Flashcards
Little is known about sleep in utero bc we don’t have the tools to measure it, we DO however know that_________
Sleep mechanisms emerge BEFORE birth
Sleep is estimated to begin at 10 weeks and we see this by__________
emergence of different BEHAVIOURAL states in utero
Rhythmic activity starts after_____ weeks
20-28
After birth, what sleeping patterns differentiate normal/ abnormal developing infant
NORMAL - NREM increase + continued waning of REM sleep, get entrained 36w after birth to regular sleep cycles
ABNORMAL - increase in NREM not seen, abnormal brain states on EEG, do NOT get entrained
‘Quiet’ sleep refers to_______, whereas ‘active’ means _____
NREM - regular breathing ; REM - irregular breathing
At 36 weeks infants begin to have rhythms, sleeping for 70% of the night and 65% of the day, they accomplish this because _______
NOT KNOWN - must be somehow genetic + entrained from mother
Typically developing neonates sleep for ______h in a 24 cycle
16-18h BUT not continuously
Describe REM/NREM patterns pre –> post birth
Building up to the birth have INCR amount of NREM
After birth, have a waning amount of REM
We know the foetal circadian rhythms emerge by ______ trimester
THIRD - begin to have regularity in HR / activity that is IN SYNC with mother
New parents struggle to sleep enough because the child also barely sleeps T/F
FALSE - get heaps of sleep but it is not regular / organised
Ultradian rhythm refers to_______
3-4h rhythms in babies where they eat, sleep, wake
After birth, describe baby’;s sleep patterns in 3 steps
Ultradian rhythm
Free running
Entrainment after 4 months (16w)
Melatonin rhythms arise at ________days
45
at _____ months child begins to sleep through most of the night
2-3 mths
> 12 months nap ______
<12 months nap ______
<6 months nap_______
>12 = 1 a day <12 = 12 a day <6 = 3-4
Sleep tends to be stable for the first few months but typically regresses in ________
4th month after birth –> 4mth sleep reggression when NREM/REM cycles emerge
What is meant by sleep organisation changes in babies?
As they get older, NUMBER of sleep periods changes;
• Polyphasic (0-1yo),
• biphasic (1-3yo),
• monophasic (3+) i.e. one sleep period per 24h
K complexes + SWS emerge ________ months
at 6 months
Which is INCORECT;
a) toddlers have a dramatic drop in sleep duration
b) by 4-5 sleep rhythms start to resemble adults
c) sleep rhythms are longer than adults
d) circadian preference starts to develop by 6-yo
C - rhtyhms are SHORTER than adults lasting 40-60min + more cycles
By ______ age REM/NREM are established and are identical to adults;
a) 10
b) 12
c) 14
d) 16
D - 16
Adolescents have dramatic fall in sleep duration but maintain the same NEED for sleep. This is caused by ‘the perfect storm’consisting of 3 components______
1) circadian phase delay = onset of biological signals get delayed
2) Slowed rise of sleep pressure = signal to sleep is weakened
3) more sensitive to light
Sleep is adulthood is primarily associated with increased ___________
sleep fragmentation
TST dramatically decreases with age T/F
False - does decrease by 10 mins each decade. Assoc w incr sleep awakenings = reduced EFFICIENCY
Young bodies are more resistant to sleep deprivation T/F
False - OLDER people are more resilient to sleep deprivation. (but this is liekly due to their system malfunctioning)
