期刊
CEREBRAL CORTEX
卷 16, 期 12, 页码 1709-1717出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/cercor/bhj106
关键词
Broca's area; fMRI; left frontal operculum; linguistic complexity; pars opercularis; syntax; ungrammaticality
We used event-related functional magnetic resonance imaging to directly compare the hemodynamic responses associated with varying degrees of linguistic complexity with those engendered by the processing of ungrammatical utterances. We demonstrate a dissociation within the left inferior frontal cortex between the deep frontal operculum, which responds to syntactic violations, and a core region of Broca's area, that is, the inferior portion of the left pars opercularis in Brodmann area 44, the activation of which is modulated as a function of the complexity of well-formed sentences. The data demonstrate that different brain regions in the prefrontal cortex support distinct mechanisms in the mapping from a linguistic form onto meaning, thereby separating ungrammaticality from linguistic complexity.
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