The periods of deep sleep lengthen and there's a reduction in the amounts of active/REM sleep - it's not known if REM activity is accompanied by dreaming as babies & children are too ----- to provide reliable subjective reports.
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Card 7
Front
By the age of 5, children have --- patterns that look like those of an adult but they are still sleeping more (about 12 hours per day) & having more REM activity (about 30% of total sleep time).
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Card 8
Front
Boys sleep slightly ---- than girls.
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Card 9
Front
During childhood it's not uncommon for children to experience a variety of ----------- (sleep disorders such as sleep walking or night terrors).
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Card 10
Front
During childhood the need to sleep decreases, but in adolescence it -------- slightly, to about nine or ten hours a night.
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Card 11
Front
Circadian rhythms also change so that teenagers feel naturally more awake later at night and have more ---------- getting up early (a phase delay).
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Card 12
Front
'Normal' adult sleep is about eight hours per night, with 25% in REM sleep - childhood parasomnias (sleep walking) are more rare in adulthood but there's an increasing frequency of other sleep --------- (insomnia & apnoea).
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Card 13
Front
With increasing age, total sleep time stays about the same but older people have more difficulty going to sleep & wake up more frequently (up to 6 times a night) - may have to nap during the day to ------- their sleep needs.
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Card 14
Front
With old age the pattern of sleep changes; REM sleep decreases to about 20% of total sleep time & the amount of slow wave sleep is considerably ------- to as little as 5% or even none (other kinds of NREM sleep increase).
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Card 15
Front
Older people also experience a phase advance of --------- rhythms - feeling sleepier earlier in the evening & waking up earlier.
