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  Functional brain plasticity during L1 training on complex sentences: Changes in gamma‐band oscillatory activity

Wang, P., Knösche, T. R., Chen, L., Brauer, J., Friederici, A. D., & Maess, B. (2021). Functional brain plasticity during L1 training on complex sentences: Changes in gamma‐band oscillatory activity. Human Brain Mapping, 42(12), 3858-3870. doi:10.1002/hbm.25470.

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 Creators:
Wang, Peng1, Author              
Knösche, Thomas R.1, Author              
Chen, Luyao2, 3, Author              
Brauer, Jens3, 4, Author              
Friederici, Angela D.3, Author              
Maess, Burkhard1, Author              
Affiliations:
1Methods and Development Group Brain Networks, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_2205650              
2College of Chinese Language and Culture, Beijing Normal University, China, ou_persistent22              
3Department Neuropsychology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634551              
4Friedrich Schiller University Jena, Germany, ou_persistent22              

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Free keywords: Brain plasticity; First language (L1) training; Language network; Magnetoencephalography; Oscillatory brain activity; Speech processing
 Abstract: The adult human brain remains plastic even after puberty. However, whether first language (L1) training in adults can alter the language network is yet largely unknown. Thus, we conducted a longitudinal training experiment on syntactically complex German sentence comprehension. Sentence complexity was varied by the depth of the center embedded relative clauses (i.e., single or double embedded). Comprehension was tested after each sentence with a question on the thematic role assignment. Thirty adult, native German speakers were recruited for 4 days of training. Magnetoencephalography (MEG) data were recorded and subjected to spectral power analysis covering the classical frequency bands (i.e., theta, alpha, beta, low gamma, and gamma). Normalized spectral power, time-locked to the final closure of the relative clause, was subjected to a two-factor analysis (“sentence complexity” and “training days”). Results showed that for the more complex sentences, the interaction of sentence complexity and training days was observed in Brodmann area 44 (BA 44) as a decrease of gamma power with training. Moreover, in the gamma band (55–95 Hz) functional connectivity between BA 44 and other brain regions such as the inferior frontal sulcus and the inferior parietal cortex were correlated with behavioral performance increase due to training. These results show that even for native speakers, complex L1 sentence training improves language performance and alters neural activities of the left hemispheric language network. Training strengthens the use of the dorsal processing stream with working-memory-related brain regions for syntactically complex sentences, thereby demonstrating the brain's functional plasticity for L1 training.

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Language(s): eng - English
 Dates: 2021-04-162021-03-222021-04-262021-05-042021-08-15
 Publication Status: Published in print
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.1002/hbm.25470
Other: epub 2021
PMID: 33942956
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Grant ID : SPP2041, FR519, KN588
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Funding organization : Deutsche Forschungsgemeinschaft

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Title: Human Brain Mapping
Source Genre: Journal
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Publ. Info: New York : Wiley-Liss
Pages: - Volume / Issue: 42 (12) Sequence Number: - Start / End Page: 3858 - 3870 Identifier: ISSN: 1065-9471
CoNE: https://pure.mpg.de/cone/journals/resource/954925601686