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  Probing the involvement of the right hemisphere in language processing with online transcranial magnetic stimulation in healthy volunteers

Hartwigsen, G., & Siebner, H. R. (2012). Probing the involvement of the right hemisphere in language processing with online transcranial magnetic stimulation in healthy volunteers. Aphasiology, 26(9), 1131-1152. doi:10.1080/02687038.2011.590573.

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 Creators:
Hartwigsen, Gesa1, Author              
Siebner, Hartwig R.2, Author
Affiliations:
1Language & Aphasia Laboratory, Clinic for Cognitive Neurology, University of Leipzig, Germany, ou_persistent22              
2Danish Research Centre for Magnetic Resonance, Copenhagen University Hospital Hvidovre, Denmark, ou_persistent22              

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Free keywords: Compensation; Lesion; Lateralization; Broca; Wernicke; Speech
 Abstract: Background: Current models emphasize that language-related functions are predominantly organized in left-lateralized fronto-temporo-parietal cortical networks. Aims: In this review, we summarize how “online” transcranial magnetic stimulation (TMS) during a language task can be used in healthy individuals to characterize the contribution of the stimulated area to a specific language function with a focus on the functional relevance of the right hemisphere. We first give an introduction to some basic mechanisms of TMS and outline the prerequisites for carrying out TMS studies of language. In particular, we highlight some methodological limitations and pitfalls of the TMS approach. We then review online TMS studies of language processing with a particular focus on the contribution of right hemisphere brain regions to language processing. Main Contribution: The majority of TMS studies on language have targeted a single left- hemisphere cortical area during a language task to identify the relevance of that area for a specific aspect of language processing. TMS has also been used to characterize the involvement of homologous right hemisphere regions. These studies have provided evidence for a significant role of right hemisphere regions in different aspects of language processing, including word comprehension, reading and paralinguistic features like emotional prosody. Conclusions: Recently, two areas have been targeted simultaneously with TMS while subjects performed a language task. This multifocal TMS approach has opened up new possibilities to compare the functional involvement of homologous regions in the right and left hemisphere and allows for the characterization of interhemispheric compensation during language processing.

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Language(s): eng - English
 Dates: 2012-09
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1080/02687038.2011.590573
 Degree: -

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Title: Aphasiology
Source Genre: Journal
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Publ. Info: London, United Kingdom : Taylor & Francis
Pages: - Volume / Issue: 26 (9) Sequence Number: - Start / End Page: 1131 - 1152 Identifier: ISSN: 0268-7038
CoNE: https://pure.mpg.de/cone/journals/resource/0268-7038