Bilingualism and “brain reserve”: a matter of age

There is a lively debate whether bilingualism as a state of permanent cognitive control contributes to so-called brain reserve, thus delaying the onset of symptoms associated with neurodegeneration by up to 5 years. Here, we address this question in a large-scale (n = 399) population-based study. We compared the gray matter volume of monolinguals versus bilinguals in the left inferior frontal gyrus and inferior parietal lobule cortex and its...