Human languages are based on syntax, a set of rules which allow an infinite number of meaningful sentences to be constructed from a finite set of words. A theory associated with Chomsky and others holds that syntax is a mind-internal, universal structure independent of semantics. This theory, however, has been challenged by studies of the Chinese language showing that syntax is processed under the semantic umbrella, and is secondary and not independent. Here, using intracranial high-density electrocorticography, we find distinct spatiotemporal patterns of neural activity in the left inferior frontal gyrus that are specifically associated with syntactic and semantic processing of Chinese sentences. These results suggest that syntactic processing may occur before semantic processing. Our findings are consistent with the view that the human brain implements syntactic structures in a manner that is independent of semantics.
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This work was supported by a grant on child brain-mind development in China’s Brain Initiative (no. SQ2021AAA010024) and by the Shenzhen Peacock Team Plan (no. KQTD2015033016104926), a Guangdong Pearl River Talents Plan Innovative and Entrepreneurial Team grant (no. 2016ZT06S220), The National Natural Science Foundation of China (grant no. 32171054), a Guangdong Key Basic Research Grant (no. 2018B030332001), Shenzhen Basic Research Grants (nos. JCYJ20170818110103216, JCYJ20170412164413575 and 2021SHIBS0003), the National Top Talent Undergraduate Training Programme (NTTUTP), the Shanghai Municipal Science and Technology Major Project (no. 2018SHZDZX01), the Shanghai Shenkang Hospital Development Centre (no. SHDC12018114), the Shanghai Rising-Star Programme (no. 19QA1401700) and the Shanghai Pujiang Programme (no. 21PJD007).
The authors declare no competing interests.
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Zhu, Y., Xu, M., Lu, J. et al. Distinct spatiotemporal patterns of syntactic and semantic processing in human inferior frontal gyrus. Nat Hum Behav 6, 1104–1111 (2022). https://doi.org/10.1038/s41562-022-01334-6