Stefan Elmer and Jürgen Hänggi contributed equally to this study.
Differential language expertise related to white matter architecture in regions subserving sensory-motor coupling, articulation, and interhemispheric transfer
Version of Record online: 15 DEC 2010
Copyright © 2010 Wiley Periodicals, Inc.
Human Brain Mapping
Volume 32, Issue 12, pages 2064–2074, December 2011
How to Cite
Elmer, S., Hänggi, J., Meyer, M. and Jäncke, L. (2011), Differential language expertise related to white matter architecture in regions subserving sensory-motor coupling, articulation, and interhemispheric transfer. Hum. Brain Mapp., 32: 2064–2074. doi: 10.1002/hbm.21169
- Issue online: 10 NOV 2011
- Version of Record online: 15 DEC 2010
- Manuscript Accepted: 27 AUG 2010
- Manuscript Revised: 2 AUG 2010
- Manuscript Received: 11 FEB 2010
- Swiss National Science Foundation (SNF). Grant Number: 320030-120661 to M.M.
- diffusion tensor imaging;
- corpus callosum;
- simultaneous interpreters
The technique of diffusion tensor imaging (DTI) has been used to investigate alterations in white matter architecture following long-term training and expertise. Professional simultaneous interpreters (SI) provide an ideal model for the investigation of training-induced plasticity due to the high demands placed on sound to motor mapping mechanisms, which are vital for executing fast interpretations. In line with our hypothesis, we found clusters with decreased fractional anisotropy (FA) in the SI group in brain regions previously shown to support sensory-motor coupling mechanisms and speech articulation (cluster extent family-wise error corrected, P < 0.01). Furthermore, we found an altered white matter architecture indicated by lower FA values in the SI group in the most anterior and posterior parts of the corpus callosum. Our results suggest that language expertise is accompanied by plastic adaptations in regions strongly involved in motor aspects of speech and in interhemispheric information transfer. These results have implications for our understanding of language expertise in relation to white matter adaptations. Hum Brain Mapp, 2011. © 2010 Wiley Periodicals, Inc.