A team of researchers affiliated with several institutions in the U.S. and Denmark has learned more about the role that white matter plays in brain function by comparing thousands of MRI images with genetic data. In their paper published in the journal Science, the group describes their analysis of genetic and neuroimaging data from almost 44,000 individuals. Christopher Filley with the University of Colorado School of Medicine has published a Perspectives piece in the same journal issue outlining issues with the study of white matter in the brain and the work done by the team with this new effort.