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  Broca’s region: A causal role in implicit processing of grammars with crossed non-adjacent dependencies

Udden, J., Ingvar, M., Hagoort, P., & Petersson, K. M. (2017). Broca’s region: A causal role in implicit processing of grammars with crossed non-adjacent dependencies. Cognition, 164, 188-198. doi:10.1016/j.cognition.2017.03.010.

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 Creators:
Udden, Julia1, 2, Author           
Ingvar, Martin3, Author
Hagoort, Peter1, 2, Author           
Petersson, Karl Magnus1, 2, 4, Author           
Affiliations:
1Neurobiology of Language Department, MPI for Psycholinguistics, Max Planck Society, ou_792551              
2Donders Institute for Brain, Cognition and Behaviour, External Organizations, ou_55236              
3Stockholm Brain Institute, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden, ou_persistent22              
4Cognitive Neuroscience Research Group, Centre for Biomedical Research, Universidade do Algarve, Faro, Portugal , ou_persistent22              

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 Abstract: Non-adjacent dependencies are challenging for the language learning machinery and are acquired later than adjacent dependencies. In this transcranial magnetic stimulation (TMS) study, we show that participants successfully discriminated between grammatical and non-grammatical sequences after having implicitly acquired an artificial language with crossed non-adjacent dependencies. Subsequent to transcranial magnetic stimulation of Broca’s region, discrimination was impaired compared to when a language-irrelevant control region (vertex) was stimulated. These results support the view that Broca’s region is engaged in structured sequence processing and extend previous functional neuroimaging results on artificial grammar learning (AGL) in two directions: first, the results establish that Broca’s region is a causal component in the processing of non-adjacent dependencies, and second, they show that implicit processing of non-adjacent dependencies engages Broca’s region. Since patients with lesions in Broca’s region do not always show grammatical processing difficulties, the result that Broca’s region is causally linked to processing of non-adjacent dependencies is a step towards clarification of the exact nature of syntactic deficits caused by lesions or perturbation to Broca’s region. Our findings are consistent with previous results and support a role for Broca’s region in general structured sequence processing, rather than a specific role for the processing of hierarchically organized sentence structure.

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Language(s): eng - English
 Dates: 20172017-04-252017
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.cognition.2017.03.010
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Title: Cognition
  Other : Cognition
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 164 Sequence Number: - Start / End Page: 188 - 198 Identifier: ISSN: 0010-0277
CoNE: https://pure.mpg.de/cone/journals/resource/954925391298