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.

“Interestingly, during a night of sleep, connections weakened within hemispheres but strengthened between hemispheres,” Kurth said.

via During sleep, connections in children’s brains strengthen – Medical News Today.