Blue regions show increased activation in neural motor structures when the person is speaking a second language.

Copyright © 2005 Wiley-Liss, Inc. Word and Nonword Repetition in Bilingual Subjects: A PET Study. Denise Klein, Kate E. Watkins, Robert J. Zatorre, and Brenda Milner, Human Brain MAPping 27: 153–161 (2006). Permission conveyed through Copyright Clearance Center, Inc.