Nat. Neurosci. 15, 769–775 (2012); published online 25 March 2012; corrected after print 5 June 2012

In the version of this article initially published, the Figure 3a legend described the ripple-activated neurons as representing oriens-lacunosum moleculare interneurons and the ripple-suppressed as representing bistratified interneurons. The reverse is true. The error has been corrected in the HTML and PDF versions of the article.