Chapter Five: Infant Bio-social Development

Terms in this set (40)

Newborns spend most their time sleeping, about 15 to 17 hours. The hours of sleep decrease rapidly with maturity:
The norm for 2 months is 14 1/2 hours; the next 3 months is 13 1/4 hours; for 6-17 months is 12 3/4 hours.
Variation is particularly apparent in the early months, when 5 percent of new babies sleep 9 hours or fewer a day and another 5 percent sleep 19 or more hours a day.
The specific of sleep vary (not just because of age or baby's characteristics) because of social environment. With responsive parents with children that were full term and well fed, usually sleep more than lower birth weight ones, who need to eat every two hours. Babies who are fed cow's milk and cereal sleep more soundly, which is not necessarily good. If parents respond to predawn cries with food and play, babies learn to wake up night after night.
Regular and ample sleep correlates with normal brain maturation, learning, emotional regulation, academic success, and psychological adjustment. Children who wake up frequently and sleep too little, often have other physical or psychological problems. Life long sleep deprivation can cause health problems.
Over the first months, the relative amount of time spent in each type of stage of sleep changes. Babies born preterm may always seem to be dozing, full term babies newborns sleep a lot; about half of their sleep is REM sleep. Dreaming declines over the early weeks, as does "transitional sleep" , the dozing, half awake stage. At 3-4 months, quiet sleep (slow wave sleep) increases.
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