It is only those nerve cells that form functional networks which survive," says Klas Blomgren. During the first few years of life, a large number of neurons that are not used are sifted out. ![]() When we are born, our brains have many more neurons than we will later need in our adult life. The reason for brain cells reacting so differently can be traced in our development. "If we try to protect an immature brain in the same way as we protect an adult brain, it may have exactly the opposite effect," says Klas Blomgren, professor of perinatal brain research at the Department of Women's and Children's Health, Karolinska Institutet. This also means that treatments developed to protect adults against the effects of extensive necrosis can be directly harmful to young children.
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