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Lifespan Changes In Sleep Notes

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Lifespan changes in sleep Changes:

Sleep varies by age, both qualitatively (different stages of sleep) and quantitatively (how much sleep) Newborns sleep an average of 16 to 18 hours a day - in early months, sleep is divided equally between REM and non-REM sleep - different proportion compared to adults EEG of an infant in REM sleep is not noticeably different from its waking EEG - in contrast to adults, infants in REM sleep are quite restless, with arm, leg and face muscles moving almost constantly - difference in level of activity during sleep Also the case with foetuses, as pregnant mothers can feel kicking at any hour


Have a different sequence of sleep to adults - newborn baby will often enter REM sleep immediately - not until after 3 months that the sequence of NREM and REM sleep is established Regular pattern of sleeping and waking is rarely established in newborns, but by 20 weeks infants are mainly awake between 10am and 8pm - newborns need food more regularly so no regular sleep pattern


By the age of 1, children sleep 13-14 hours, with the entire sleep cycle occurring every 45-60 minutes - much longer periods of sleep By the age of 5-10, the sleep cycle increases to last 70 minutes - Borbely 1986 Between the ages of 5 and 12, total nocturnal sleep drops to 9-10 hours


Seem to experience sleep-wake utopia - bursting with energy during the day and sleep soundly at night, so they are wide awake and fully rested from the moment they wake in the morning - Dement 1999

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