The connections between the left and the right hemispheres of the brain strengthen in young children while they sleeo, which may help brain functions mature, according to a new paper.
Scientists have known that the brain changes drastically during early childhood: New connections are formed, others are removed and a fatty layer called "myelin" forms around nerve fibers in the brain. The growth of myelin strengthens the connections by speeding up the transfer of information.
Maturation of nerve fibers leads to improvement in skills such as language, attention and impulse control. But it is still not clear what role sleep plays in the development of such brain connections.