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Connectivity of Fronto-Temporal Regions in Syntactic Structure Building During Speaking and Listening
Laura Giglio1,2, Daniel Sharoh1,2, Markus Ostarek1
1Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands.
Neurobiology of Language (Cambridge, Mass.)
|October 23, 2024
Summary
Neural regions for sentence production and comprehension largely overlap. This study shows that brain connectivity in these areas increases with sentence complexity, supporting shared neural resources for both speaking and listening.
Area of Science:
- Neuroscience
- Cognitive Science
- Psycholinguistics
Background:
- Sentence production and comprehension share neural infrastructure.
- Modality (speaking vs. listening) influences activation strength in these regions.
Purpose of the Study:
- Investigate how modality affects brain connectivity during syntactic processing.
- Determine the impact of constituent size and modality on connectivity between key frontal and temporal regions.
Main Methods:
- Examined connectivity of pars triangularis (LIFG) and LPTL with pars opercularis (LIFG), LATL, and other brain regions.
- Assessed effects of constituent size and modality on functional connectivity.
Main Results:
- Constituent size consistently increased connectivity across frontal and temporal regions.
- Connectivity between LIFG regions and LPTL was enhanced by constituent size in both modalities.
- Connectivity with LATL was lower but increased for larger constituents, suggesting its role in sentence processing.
Conclusions:
- Fronto-temporal brain connectivity is upregulated for syntactic structure building in both sentence production and comprehension.
- Findings provide evidence for shared neural resources across modalities for sentence-level processing.
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