Nature Neuroscience 10, 19–26 (2007); Published online 26 December 2006; corrected after print 23 January 2007

In the version of this article initially published, the chromosomal loci for NrCAM and neurofascin were reversed in Table 2. The table should read NrCAM—link to human disease (7q31.1), neurofascin—link to human disease (1q32.1). This error has been corrected in the PDF and HTML versions of the article.