Connections in the brains of young children strengthen during sleep, CU-Boulder study finds

November 20, 2013 •

While young children sleep, connections between the left and the right hemispheres of their brain strengthen, which may help brain functions mature, according to a new study by the University of Colorado Boulder.

The research team—led by Salome Kurth, a postdoctoral researcher, and Monique LeBourgeois, assistant professor in integrative physiology—used electroencephalograms, or EEGs, to measure the brain activity of eight sleeping children multiple times at the ages of 2, 3 and 5 years.




In the new study, appearing online in the journal Brain Sciences, the researchers looked at differences in brain activity during sleep as the children got older and differences in brain activity of each child over a night’s sleep. They found that connections in the brain generally became stronger during sleep as the children aged.  They also found that the strength of the connections between the left and right hemispheres increased by as much as 20 percent over a night’s sleep.

“There are strong indications that sleep and brain maturation are closely related, but at this time, it is not known how sleep leads to changes in brain structure,” Kurth said.

Future studies will be aimed at determining how sleep disruption during childhood may affect brain development and behavior.


Other co-authors of the study include Thomas Rusterholz, a former CU-Boulder postdoctoral researcher; and Peter Achermann, a sleep researcher at the University of Zurich in Switzerland.

The study was funded by the National Institute of Mental Health, Sepracor Inc. and the Swiss National Science Foundation.

Salome Kurth, 303-492-4584
Laura Snider, CU media relations, 303-735-0528