Westchester, Ill. A study in the March 1 issue of the journal SLEEP suggests that it is the rate of change in sleep problems across development, rather than the initial level of sleep problems, that may affect cognitive abilities in late adolescence.
Results indicate that those children whose sleep problems persisted across development had poorer executive functioning at age 17 than children whose problems decreased to a greater extent. Sleep problems declined across the years of childhood development, with approximately 70 percent of children having more than one problem at age 4 and about 33 percent of children having problems at age 16.
Sleep problems as early as age 9, but particularly around age 13, showed significant associations with later executive functions. The findings suggest that a child's level of sleep problems early in life, when such problems as nightmares and trouble sleeping may seem more common, do not appear to have appreciable implications for eventual executive control.
The study considered seven specific sleep problems: nightmares, sleep talking, sleepwalking, bedwetting, sleeping less or more than most children during the day or night, trouble sleeping and being overtired. According to principal investigator and lead author Naomi Friedman, PhD, senior research associate at the Institute for Behavioral Genetics at the University of Colorado at Boulder, the results also show that certain sleep problems in children may affect later executive functioning more than others.
"When we looked at each of the seven sleep problems separately, we found that changes in levels of 'sleeping more than other children' and 'being overtired' were the strongest predictors of later executive control, and developmental trajectories of nightmares and 'trouble sleeping' were the weakest predictors," said Friedman.
According to the authors, executive functions are cognitive-control mechanisms tha
|Contact: Kelly Wagner|
American Academy of Sleep Medicine