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A common neural hub resolves syntactic and non-syntactic conflict through cooperation with task-specific networks.
Hsu, Nina S; Jaeggi, Susanne M; Novick, Jared M. - : eScholarship, University of California, 2017
Abstract: Regions within the left inferior frontal gyrus (LIFG) have simultaneously been implicated in syntactic processing and cognitive control. Accounts attempting to unify LIFG's function hypothesize that, during comprehension, cognitive control resolves conflict between incompatible representations of sentence meaning. Some studies demonstrate co-localized activity within LIFG for syntactic and non-syntactic conflict resolution, suggesting domain-generality, but others show non-overlapping activity, suggesting domain-specific cognitive control and/or regions that respond uniquely to syntax. We propose however that examining exclusive activation sites for certain contrasts creates a false dichotomy: both domain-general and domain-specific neural machinery must coordinate to facilitate conflict resolution across domains. Here, subjects completed four diverse tasks involving conflict -one syntactic, three non-syntactic- while undergoing fMRI. Though LIFG consistently activated within individuals during conflict processing, functional connectivity analyses revealed task-specific coordination with distinct brain networks. Thus, LIFG may function as a conflict-resolution "hub" that cooperates with specialized neural systems according to information content.
Keyword: Adolescent; Adult; Brain; Brain Mapping; Cognitive control; Communication and Culture; Comprehension; Conflict; Cooperative Behavior; Domain-generality; Domain-specificity; Experimental Psychology; Female; Frontal Lobe; Humans; Language; Language processing; Magnetic Resonance Imaging; Male; Medical and Health Sciences; Nerve Net; Network connectivity; Photic Stimulation; Psychological; Psychology and Cognitive Sciences; Psychomotor Performance; Stroop Test; Young Adult
URL: https://escholarship.org/uc/item/59r7b62h
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